teldufalsari/kmath
2
0
Fork 0
forked from kscience/kmath
Code Pull Requests 1 Activity

Simplified use of Rational (current BigInt are hard to use and actually useless). Added tests, fixed bug.

Browse Source
This commit is contained in:
Gleb Minaev 2022-03-19 18:08:43 +03:00
parent a965f5683f
commit 90a7c4d901
6 changed files with 268 additions and 374 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/NumberedPolynomial.kt
View File

@ -246,7 +246,7 @@ public open class NumberedPolynomialSpace<C, A : Ring<C>>(
override operator fun C.minus(other: NumberedPolynomial<C>): NumberedPolynomial<C> =
if (this.isZero()) -other
else with(other.coefficients) {
if (isEmpty()) NumberedPolynomial<C>(mapOf(listOf<UInt>() to this@minus))
if (isEmpty()) NumberedPolynomial<C>(mapOf(emptyList<UInt>() to this@minus))
else NumberedPolynomial<C>(
toMutableMap()
.apply {
@ -279,7 +279,7 @@ public open class NumberedPolynomialSpace<C, A : Ring<C>>(
override operator fun NumberedPolynomial<C>.plus(other: C): NumberedPolynomial<C> =
if (other.isZero()) this
else with(coefficients) {
if (isEmpty()) NumberedPolynomial<C>(mapOf(listOf<UInt>() to other))
if (isEmpty()) NumberedPolynomial<C>(mapOf(emptyList<UInt>() to other))
else NumberedPolynomial<C>(
toMutableMap()
.apply {
@ -298,7 +298,7 @@ public open class NumberedPolynomialSpace<C, A : Ring<C>>(
override operator fun NumberedPolynomial<C>.minus(other: C): NumberedPolynomial<C> =
if (other.isZero()) this
else with(coefficients) {
if (isEmpty()) NumberedPolynomial<C>(mapOf(listOf<UInt>() to other))
if (isEmpty()) NumberedPolynomial<C>(mapOf(emptyList<UInt>() to other))
else NumberedPolynomial<C>(
toMutableMap()
.apply {
@ -416,7 +416,7 @@ public open class NumberedPolynomialSpace<C, A : Ring<C>>(
override val one: NumberedPolynomial<C> =
NumberedPolynomial<C>(
mapOf(
listOf<UInt>() to constantOne // 1 * x_1^0 * x_2^0 * ...
emptyList<UInt>() to constantOne // 1 * x_1^0 * x_2^0 * ...
)
)

2
kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
View File

@ -276,7 +276,7 @@ public open class PolynomialSpace<C, A : Ring<C>>(
public override operator fun Polynomial<C>.minus(other: C): Polynomial<C> =
if (other.isZero()) this
else with(coefficients) {
if (isEmpty()) Polynomial(listOf(other))
if (isEmpty()) Polynomial(listOf(-other))
else Polynomial(
toMutableList()
.apply {

225
kmath-functions/src/commonTest/kotlin/space/kscience/kmath/functions/PolynomialTest.kt
View File

@ -5,16 +5,173 @@
package space.kscience.kmath.functions
import space.kscience.kmath.operations.BigInt
import space.kscience.kmath.operations.algebra
import space.kscience.kmath.operations.toBigInt
import space.kscience.kmath.test.misc.Rational
import space.kscience.kmath.test.misc.RationalField
import space.kscience.kmath.test.misc.gcd
import kotlin.test.Test
import kotlin.test.assertEquals
class PolynomialTest {
@Test
fun test_Polynomial_Int_plus() {
RationalField.polynomial {
assertEquals(
Polynomial(Rational(-22, 9), Rational(-8, 9), Rational(-8, 7)),
Polynomial(Rational(5, 9), Rational(-8, 9), Rational(-8, 7)) + -3,
"test 1"
)
assertEquals(
Polynomial(Rational(0), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(-2), Rational(0), Rational(0), Rational(0)) + 2,
"test 2"
)
assertEquals(
Polynomial(),
Polynomial(Rational(-2)) + 2,
"test 3"
)
assertEquals(
Polynomial(),
Polynomial<Rational>() + 0,
"test 4"
)
assertEquals(
Polynomial(Rational(-1), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(-2), Rational(0), Rational(0), Rational(0)) + 1,
"test 5"
)
assertEquals(
Polynomial(Rational(-1)),
Polynomial(Rational(-2)) + 1,
"test 6"
)
assertEquals(
Polynomial(Rational(2)),
Polynomial<Rational>() + 2,
"test 7"
)
}
}
@Test
fun test_Polynomial_Int_minus() {
RationalField.polynomial {
assertEquals(
Polynomial(Rational(32, 9), Rational(-8, 9), Rational(-8, 7)),
Polynomial(Rational(5, 9), Rational(-8, 9), Rational(-8, 7)) - -3,
"test 1"
)
assertEquals(
Polynomial(Rational(0), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(2), Rational(0), Rational(0), Rational(0)) - 2,
"test 2"
)
assertEquals(
Polynomial(),
Polynomial(Rational(2)) - 2,
"test 3"
)
assertEquals(
Polynomial(),
Polynomial<Rational>() - 0,
"test 4"
)
assertEquals(
Polynomial(Rational(1), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(2), Rational(0), Rational(0), Rational(0)) - 1,
"test 5"
)
assertEquals(
Polynomial(Rational(1)),
Polynomial(Rational(2)) - 1,
"test 6"
)
assertEquals(
Polynomial(Rational(-2)),
Polynomial<Rational>() - 2,
"test 7"
)
}
}
@Test
fun test_Polynomial_Constant_plus() {
RationalField.polynomial {
assertEquals(
Polynomial(Rational(-22, 9), Rational(-8, 9), Rational(-8, 7)),
Polynomial(Rational(5, 9), Rational(-8, 9), Rational(-8, 7)) + Rational(-3),
"test 1"
)
assertEquals(
Polynomial(Rational(0), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(-2), Rational(0), Rational(0), Rational(0)) + Rational(2),
"test 2"
)
assertEquals(
Polynomial(),
Polynomial(Rational(-2)) + Rational(2),
"test 3"
)
assertEquals(
Polynomial(),
Polynomial<Rational>() + Rational(0),
"test 4"
)
assertEquals(
Polynomial(Rational(-1), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(-2), Rational(0), Rational(0), Rational(0)) + Rational(1),
"test 5"
)
assertEquals(
Polynomial(Rational(-1)),
Polynomial(Rational(-2)) + Rational(1),
"test 6"
)
assertEquals(
Polynomial(Rational(2)),
Polynomial<Rational>() + Rational(2),
"test 7"
)
}
}
@Test
fun test_Polynomial_Constant_minus() {
RationalField.polynomial {
assertEquals(
Polynomial(Rational(32, 9), Rational(-8, 9), Rational(-8, 7)),
Polynomial(Rational(5, 9), Rational(-8, 9), Rational(-8, 7)) - Rational(-3),
"test 1"
)
assertEquals(
Polynomial(Rational(0), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(2), Rational(0), Rational(0), Rational(0)) - Rational(2),
"test 2"
)
assertEquals(
Polynomial(),
Polynomial(Rational(2)) - Rational(2),
"test 3"
)
assertEquals(
Polynomial(),
Polynomial<Rational>() - Rational(0),
"test 4"
)
assertEquals(
Polynomial(Rational(1), Rational(0), Rational(0), Rational(0)),
Polynomial(Rational(2), Rational(0), Rational(0), Rational(0)) - Rational(1),
"test 5"
)
assertEquals(
Polynomial(Rational(1)),
Polynomial(Rational(2)) - Rational(1),
"test 6"
)
assertEquals(
Polynomial(Rational(-2)),
Polynomial<Rational>() - Rational(2),
"test 7"
)
}
}
@Test
fun test_Polynomial_Polynomial_plus() {
RationalField.polynomial {
@ -48,35 +205,39 @@ class PolynomialTest {
)
}
}
// @Test
// fun test_Polynomial_Polynomial_minus() {
// RationalField.polynomial {
// assertEquals(
// Polynomial(Rational(1, 2), Rational(3, 5), Rational(-2)) +
// Polynomial(Rational(3), Rational(7, 8), Rational(1, 9)),
// Polynomial(Rational(7, 2), Rational(59, 40), Rational(-17, 9)),
// "test 1"
// )
// assertEquals(
// Polynomial(Rational(1, 2), Rational(3, 5)) +
// Polynomial(Rational(3), Rational(7, 8), Rational(1, 9)),
// Polynomial(Rational(7, 2), Rational(59, 40), Rational(1, 9)),
// "test 2"
// )
// assertEquals(
// Polynomial(Rational(1, 2), Rational(3, 5), Rational(0), Rational(0)) +
// Polynomial(Rational(3), Rational(7, 8), Rational(1, 9)),
// Polynomial(Rational(7, 2), Rational(59, 40), Rational(1, 9)),
// "test 3"
// )
// assertEquals(
// Polynomial(Rational(1, 2), Rational(-3, 5), Rational(7, 3)) +
// Polynomial(Rational(3), Rational(3, 5), Rational(-7, 3)),
// Polynomial(Rational(7, 2)),
// "test 4"
// )
// }
// }
@Test
fun test_Polynomial_Polynomial_minus() {
RationalField.polynomial {
// (5/9 - 8/9 x - 8/7 x^2) - (-5/7 + 5/1 x + 5/8 x^2) ?= 80/63 - 53/9 x - 99/56 x^2
assertEquals(
Polynomial(Rational(80, 63), Rational(-53, 9), Rational(-99, 56)),
Polynomial(Rational(5, 9), Rational(-8, 9), Rational(-8, 7)) -
Polynomial(Rational(-5, 7), Rational(5, 1), Rational(5, 8)),
"test 1"
)
// (-2/9 - 8/3 x) - (0 + 9/4 x + 2/4 x^2) ?= -2/9 - 59/12 x - 2/4 x^2
assertEquals(
Polynomial(Rational(-2, 9), Rational(-59, 12), Rational(-2, 4)),
Polynomial(Rational(-2, 9), Rational(-8, 3)) -
Polynomial(Rational(0), Rational(9, 4), Rational(2, 4)),
"test 2"
)
// (-4/7 - 2/6 x + 0 x^2 + 0 x^3) - (-6/3 - 7/2 x + 2/3 x^2) ?= 10/7 + 19/6 x - 2/3 x^2
assertEquals(
Polynomial(Rational(10, 7), Rational(19, 6), Rational(-2, 3)),
Polynomial(Rational(-4, 7), Rational(-2, 6), Rational(0), Rational(0)) -
Polynomial(Rational(-6, 3), Rational(-7, 2), Rational(2, 3)),
"test 3"
)
// (-2/4 - 6/9 x - 4/9 x^2) - (-2/4 - 6/9 x - 4/9 x^2) ?= 0
assertEquals(
Polynomial(),
Polynomial(Rational(-2, 4), Rational(-6, 9), Rational(-4, 9)) -
Polynomial(Rational(-2, 4), Rational(-6, 9), Rational(-4, 9)),
"test 4"
)
}
}
@Test
fun simple_polynomial_test() {
val polynomial : Polynomial<Double>

348
kmath-functions/src/commonTest/kotlin/space/kscience/kmath/test/misc/Rational.kt
View File

@ -6,54 +6,23 @@
package space.kscience.kmath.test.misc
import space.kscience.kmath.misc.UnstableKMathAPI
import space.kscience.kmath.operations.BigInt
import space.kscience.kmath.operations.Field
import space.kscience.kmath.operations.NumbersAddOps
import space.kscience.kmath.operations.toBigInt
import space.kscience.kmath.operations.BigInt.Companion.ZERO as I0
import space.kscience.kmath.operations.BigInt.Companion.ONE as I1
/**
* The class represents rational numbers.
*
* Instances contain [numerator] and [denominator] represented as [Long].
*
* Also [numerator] and [denominator] are coprime and [denominator] is positive.
*
* @author [Gleb Minaev](https://github.com/lounres)
*/
public class Rational: Comparable<Rational> {
public companion object {
/**
* Constant containing the zero (the additive identity) of the [Rational] field.
*/
public val ZERO: Rational = Rational(I0)
/**
* Constant containing the one (the multiplicative identity) of the [Rational] field.
*/
public val ONE: Rational = Rational(I1)
class Rational {
companion object {
val ZERO: Rational = Rational(0L)
val ONE: Rational = Rational(1L)
}
/**
* Numerator of the fraction. It's stored as non-negative coprime with [denominator] integer.
*/
public val numerator: BigInt
/**
* Denominator of the fraction. It's stored as non-zero coprime with [numerator] integer.
*/
public val denominator: BigInt
val numerator: Long
val denominator: Long
/**
* If [toCheckInput] is `true` before assigning values to [Rational.numerator] and [Rational.denominator] makes them coprime and makes
* denominator positive. Otherwise, just assigns the values.
*
* @throws ArithmeticException If denominator is zero.
*/
internal constructor(numerator: BigInt, denominator: BigInt, toCheckInput: Boolean = true) {
internal constructor(numerator: Long, denominator: Long, toCheckInput: Boolean = true) {
if (toCheckInput) {
if (denominator == I0) throw ArithmeticException("/ by zero")
if (denominator == 0L) throw ArithmeticException("/ by zero")
val greatestCommonDivider = gcd(numerator, denominator).let { if (denominator < I0) -it else it }
val greatestCommonDivider = gcd(numerator, denominator).let { if (denominator < 0L) -it else it }
this.numerator = numerator / greatestCommonDivider
this.denominator = denominator / greatestCommonDivider
@ -63,303 +32,86 @@ public class Rational: Comparable<Rational> {
}
}
/**
* Before assigning values to [Rational.numerator] and [Rational.denominator] makes them coprime and makes
* denominator positive.
*
* @throws ArithmeticException If denominator is zero.
*/
public constructor(numerator: BigInt, denominator: BigInt) : this(numerator, denominator, true)
public constructor(numerator: Int, denominator: BigInt) : this(numerator.toBigInt(), denominator, true)
public constructor(numerator: Long, denominator: BigInt) : this(numerator.toBigInt(), denominator, true)
public constructor(numerator: BigInt, denominator: Int) : this(numerator, denominator.toBigInt(), true)
public constructor(numerator: BigInt, denominator: Long) : this(numerator, denominator.toBigInt(), true)
public constructor(numerator: Int, denominator: Int) : this(numerator.toBigInt(), denominator.toBigInt(), true)
public constructor(numerator: Int, denominator: Long) : this(numerator.toBigInt(), denominator.toBigInt(), true)
public constructor(numerator: Long, denominator: Int) : this(numerator.toBigInt(), denominator.toBigInt(), true)
public constructor(numerator: Long, denominator: Long) : this(numerator.toBigInt(), denominator.toBigInt(), true)
public constructor(numerator: BigInt) : this(numerator, I1, false)
public constructor(numerator: Int) : this(numerator.toBigInt(), I1, false)
public constructor(numerator: Long) : this(numerator.toBigInt(), I1, false)
constructor(numerator: Int, denominator: Int) : this(numerator.toLong(), denominator.toLong(), true)
constructor(numerator: Int, denominator: Long) : this(numerator.toLong(), denominator, true)
constructor(numerator: Long, denominator: Int) : this(numerator, denominator.toLong(), true)
constructor(numerator: Long, denominator: Long) : this(numerator, denominator, true)
constructor(numerator: Int) : this(numerator.toLong(), 1L, false)
constructor(numerator: Long) : this(numerator, 1L, false)
/**
* Returns the same instant.
*/
public operator fun unaryPlus(): Rational = this
/**
* Returns negation of the instant of [Rational] field.
*/
public operator fun unaryMinus(): Rational = Rational(-this.numerator, this.denominator)
/**
* Returns sum of the instants of [Rational] field.
*/
public operator fun plus(other: Rational): Rational =
operator fun unaryPlus(): Rational = this
operator fun unaryMinus(): Rational = Rational(-this.numerator, this.denominator)
operator fun plus(other: Rational): Rational =
Rational(
numerator * other.denominator + denominator * other.numerator,
denominator * other.denominator
)
/**
* Returns sum of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun plus(other: BigInt): Rational =
operator fun plus(other: Int): Rational =
Rational(
numerator + denominator * other.toLong(),
denominator
)
operator fun plus(other: Long): Rational =
Rational(
numerator + denominator * other,
denominator
)
/**
* Returns sum of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun plus(other: Int): Rational =
Rational(
numerator + denominator * other.toBigInt(),
denominator
)
/**
* Returns sum of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun plus(other: Long): Rational =
Rational(
numerator + denominator * other.toBigInt(),
denominator
)
/**
* Returns difference of the instants of [Rational] field.
*/
public operator fun minus(other: Rational): Rational =
operator fun minus(other: Rational): Rational =
Rational(
numerator * other.denominator - denominator * other.numerator,
denominator * other.denominator
)
/**
* Returns difference of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun minus(other: BigInt): Rational =
operator fun minus(other: Int): Rational =
Rational(
numerator - denominator * other.toLong(),
denominator
)
operator fun minus(other: Long): Rational =
Rational(
numerator - denominator * other,
denominator
)
/**
* Returns difference of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun minus(other: Int): Rational =
Rational(
numerator - denominator * other.toBigInt(),
denominator
)
/**
* Returns difference of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun minus(other: Long): Rational =
Rational(
numerator - denominator * other.toBigInt(),
denominator
)
/**
* Returns product of the instants of [Rational] field.
*/
public operator fun times(other: Rational): Rational =
operator fun times(other: Rational): Rational =
Rational(
numerator * other.numerator,
denominator * other.denominator
)
/**
* Returns product of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun times(other: BigInt): Rational =
operator fun times(other: Int): Rational =
Rational(
numerator * other.toLong(),
denominator
)
operator fun times(other: Long): Rational =
Rational(
numerator * other,
denominator
)
/**
* Returns product of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun times(other: Int): Rational =
Rational(
numerator * other.toBigInt(),
denominator
)
/**
* Returns product of the instants of [Rational] field. [other] is represented as [Rational].
*/
public operator fun times(other: Long): Rational =
Rational(
numerator * other.toBigInt(),
denominator
)
/**
* Returns quotient of the instants of [Rational] field.
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun div(other: Rational): Rational =
operator fun div(other: Rational): Rational =
Rational(
numerator * other.denominator,
denominator * other.numerator
)
/**
* Returns quotient of the instants of [Rational] field. [other] is represented as [Rational].
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun div(other: BigInt): Rational =
operator fun div(other: Int): Rational =
Rational(
numerator,
denominator * other.toLong()
)
operator fun div(other: Long): Rational =
Rational(
numerator,
denominator * other
)
/**
* Returns quotient of the instants of [Rational] field. [other] is represented as [Rational].
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun div(other: Int): Rational =
Rational(
numerator,
denominator * other.toBigInt()
)
/**
* Returns quotient of the instants of [Rational] field. [other] is represented as [Rational].
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun div(other: Long): Rational =
Rational(
numerator,
denominator * other.toBigInt()
)
/**
* Returns reminder from integral division.
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun rem(other: Rational): Rational =
Rational(
(numerator * other.denominator) % (denominator * other.numerator),
denominator * other.denominator
)
/**
* Returns reminder from integral division.
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun rem(other: BigInt): Rational =
Rational(
numerator % denominator * other,
denominator * other
)
/**
* Returns reminder from integral division.
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun rem(other: Int): Rational =
Rational(
numerator % denominator * other.toBigInt(),
denominator * other.toBigInt()
)
/**
* Returns reminder from integral division.
*
* @throws ArithmeticException if [other] is the zero of the field it can't be a divisor.
*/
public operator fun rem(other: Long): Rational =
Rational(
numerator % denominator * other.toBigInt(),
denominator * other.toBigInt()
)
/**
* Checks equality of the instance to [other].
*
* [BigInt], [Int] and [Long] values are also checked as Rational ones.
*/
override fun equals(other: Any?): Boolean =
when (other) {
is Rational -> numerator == other.numerator && denominator == other.denominator
is BigInt -> numerator == other && denominator == I1
is Int -> numerator == other && denominator == I1
is Long -> numerator == other && denominator == I1
is Int -> numerator == other && denominator == 1L
is Long -> numerator == other && denominator == 1L
else -> false
}
/**
* Compares the instance to [other] as [Comparable.compareTo].
*
* @see Comparable.compareTo
*/
override operator fun compareTo(other: Rational): Int = (numerator * other.denominator).compareTo(other.numerator * denominator)
override fun hashCode(): Int = 31 * numerator.hashCode() + denominator.hashCode()
/**
* Compares the instance to [other] as [Comparable.compareTo].
*
* [Integer] values are also checked as Rational ones.
*
* @see Comparable.compareTo
*/
public operator fun compareTo(other: BigInt): Int = (numerator).compareTo(denominator * other)
/**
* Compares the instance to [other] as [Comparable.compareTo].
*
* [Int] values are also checked as Rational ones.
*
* @see Comparable.compareTo
*/
public operator fun compareTo(other: Int): Int = (numerator).compareTo(denominator * other.toBigInt())
/**
* Compares the instance to [other] as [Comparable.compareTo].
*
* [Long] values are also checked as Rational ones.
*
* @see Comparable.compareTo
*/
public operator fun compareTo(other: Long): Int = (numerator).compareTo(denominator * other.toBigInt())
public override fun hashCode(): Int = 31 * numerator.hashCode() + denominator.hashCode()
// /** Creates a range from this value to the specified [other] value. */
// operator fun rangeTo(other: JBInt) = ClosedRationalRange(this, other.toRational())
// /** Creates a range from this value to the specified [other] value. */
// operator fun rangeTo(other: Rational) = ClosedRationalRange(this, other)
// /** Creates a range from this value to the specified [other] value. */
// operator fun rangeTo(other: Int) = ClosedRationalRange(this, other.toRational())
// /** Creates a range from this value to the specified [other] value. */
// operator fun rangeTo(other: Long) = ClosedRationalRange(this, other.toRational())
public fun toRational(): Rational = this
public fun toBigInt(): BigInt = numerator / denominator
// public fun toInt(): Int = (numerator / denominator).toInt()
//
// public fun toLong(): Long = (numerator / denominator).toLong()
//
// public fun toDouble(): Double = (numerator.toDouble() / denominator.toDouble())
//
// public fun toFloat(): Float = (numerator.toFloat() / denominator.toFloat())
public override fun toString(): String = if (denominator == I1) "$numerator" else "$numerator/$denominator"
override fun toString(): String = if (denominator == 1L) "$numerator" else "$numerator/$denominator"
}
@ -368,7 +120,7 @@ public class Rational: Comparable<Rational> {
*/
@Suppress("EXTENSION_SHADOWED_BY_MEMBER", "OVERRIDE_BY_INLINE", "NOTHING_TO_INLINE")
@OptIn(UnstableKMathAPI::class)
public object RationalField : Field<Rational>, NumbersAddOps<Rational> {
object RationalField : Field<Rational>, NumbersAddOps<Rational> {
override inline val zero: Rational get() = Rational.ZERO
override inline val one: Rational get() = Rational.ONE

42
kmath-functions/src/commonTest/kotlin/space/kscience/kmath/test/misc/RationalWithMemorization.kt
View File

@ -12,7 +12,7 @@ class RationalWithMemorization private constructor(
val value: Rational,
override val memory : OperationsMemory
): WithMemorization {
public companion object {
companion object {
/**
* Constant containing the zero (the additive identity) of the [Rational] field.
*/
@ -22,48 +22,42 @@ class RationalWithMemorization private constructor(
*/
public val ONE: RationalWithMemorization = RationalWithMemorization(Rational.ONE, object : Endpoint {})
}
public constructor(numerator: BigInt, denominator: BigInt) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Int, denominator: BigInt) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Long, denominator: BigInt) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: BigInt, denominator: Int) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: BigInt, denominator: Long) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Int, denominator: Int) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Int, denominator: Long) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Long, denominator: Int) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: Long, denominator: Long) : this(Rational(numerator, denominator), object : Endpoint {})
public constructor(numerator: BigInt) : this(Rational(numerator), object : Endpoint {})
public constructor(numerator: Int) : this(Rational(numerator), object : Endpoint {})
public constructor(numerator: Long) : this(Rational(numerator), object : Endpoint {})
constructor(numerator: Int, denominator: Int) : this(Rational(numerator, denominator), object : Endpoint {})
constructor(numerator: Int, denominator: Long) : this(Rational(numerator, denominator), object : Endpoint {})
constructor(numerator: Long, denominator: Int) : this(Rational(numerator, denominator), object : Endpoint {})
constructor(numerator: Long, denominator: Long) : this(Rational(numerator, denominator), object : Endpoint {})
constructor(numerator: Int) : this(Rational(numerator), object : Endpoint {})
constructor(numerator: Long) : this(Rational(numerator), object : Endpoint {})
public operator fun unaryPlus(): RationalWithMemorization = this
public operator fun unaryMinus(): RationalWithMemorization = RationalWithMemorization(
operator fun unaryPlus(): RationalWithMemorization = this
operator fun unaryMinus(): RationalWithMemorization = RationalWithMemorization(
-value,
object : Negation {
override val negated: OperationsMemory = memory
}
)
public operator fun plus(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
operator fun plus(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
value + other.value,
object : Sum {
override val augend: OperationsMemory = memory
override val addend: OperationsMemory = other.memory
}
)
public operator fun minus(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
operator fun minus(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
value - other.value,
object : Difference {
override val minuend: OperationsMemory = memory
override val subtrahend: OperationsMemory = other.memory
}
)
public operator fun times(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
operator fun times(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
value * other.value,
object : Product {
override val multiplicand: OperationsMemory = memory
override val multiplier: OperationsMemory = other.memory
}
)
public operator fun div(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
operator fun div(other: RationalWithMemorization): RationalWithMemorization = RationalWithMemorization(
value / other.value,
object : Quotient {
override val dividend: OperationsMemory = memory
@ -71,16 +65,16 @@ class RationalWithMemorization private constructor(
}
)
public override fun equals(other: Any?): Boolean =
override fun equals(other: Any?): Boolean =
other is RationalWithMemorization && value == other.value
public override fun hashCode(): Int = value.hashCode()
override fun hashCode(): Int = value.hashCode()
public override fun toString(): String = value.toString()
override fun toString(): String = value.toString()
}
@Suppress("EXTENSION_SHADOWED_BY_MEMBER", "OVERRIDE_BY_INLINE", "NOTHING_TO_INLINE")
public object RationalWithMemorizationRing : Ring<RationalWithMemorization> {
object RationalWithMemorizationRing : Ring<RationalWithMemorization> {
override inline val zero: RationalWithMemorization get() = RationalWithMemorization.ZERO
override inline val one: RationalWithMemorization get() = RationalWithMemorization.ONE
@ -94,7 +88,7 @@ public object RationalWithMemorizationRing : Ring<RationalWithMemorization> {
}
@Suppress("EXTENSION_SHADOWED_BY_MEMBER", "OVERRIDE_BY_INLINE", "NOTHING_TO_INLINE")
public object RationalWithMemorizationField : Field<RationalWithMemorization> {
object RationalWithMemorizationField : Field<RationalWithMemorization> {
override inline val zero: RationalWithMemorization get() = RationalWithMemorization.ZERO
override inline val one: RationalWithMemorization get() = RationalWithMemorization.ONE

17
kmath-functions/src/commonTest/kotlin/space/kscience/kmath/test/misc/misc.kt
View File

@ -5,21 +5,8 @@
package space.kscience.kmath.test.misc
import space.kscience.kmath.operations.*
import space.kscience.kmath.operations.BigInt.Companion.ZERO as I0
import kotlin.math.abs
// TODO: Move to corresponding module "kmath-number-theory"
/**
* Computes [Greatest Common Divisor](https://en.wikipedia.org/wiki/Greatest_common_divisor) of [a] and [b].
*
* It's computed by [Euclidean algorithm](https://en.wikipedia.org/wiki/Greatest_common_divisor#Euclidean_algorithm).
* Hence, its time complexity is $$O(\log(a+b))$$ (see [Wolfram MathWorld](https://mathworld.wolfram.com/EuclideanAlgorithm.html)).
*/
public tailrec fun gcd(a: BigInt, b: BigInt): BigInt = if (a == I0) abs(b) else gcd(b % a, a)
/**
* Computes [Greatest Common Divisor](https://en.wikipedia.org/wiki/Greatest_common_divisor) of the [values].
*/
public fun gcd(vararg values: BigInt): BigInt = values.reduce(::gcd)
public fun gcd(values: Iterable<BigInt>): BigInt = values.reduce(::gcd)
tailrec fun gcd(a: Long, b: Long): Long = if (a == 0L) abs(b) else gcd(b % a, a)