kscience/kmath
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Merge branch 'dev' into dev-0.4

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# Conflicts:
#	kmath-ejml/src/main/kotlin/space/kscience/kmath/ejml/_generated.kt
This commit is contained in:
Alexander Nozik 2024-02-16 18:57:57 +03:00
commit 7d88fb0166
2 changed files with 14 additions and 2 deletions
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11
kmath-complex/src/commonMain/kotlin/space/kscience/kmath/complex/Complex.kt
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@ -144,12 +144,19 @@ public object ComplexField :
zero zero
} }
} }
} else { } else {
exp(pow * ln(arg)) exp(pow * ln(arg))
} }
public fun power(arg: Complex, pow: Complex): Complex = exp(pow * ln(arg)) public fun power(arg: Complex, pow: Complex): Complex = if(arg == zero || arg == (-0.0).toComplex()){
if(pow == zero){
one
} else {
zero
}
} else {
exp(pow * ln(arg))
}
public fun Complex.pow(power: Complex): Complex = power(this, power) public fun Complex.pow(power: Complex): Complex = power(this, power)

5
kmath-complex/src/commonTest/kotlin/space/kscience/kmath/complex/ComplexFieldTest.kt
View File

@ -71,6 +71,11 @@ internal class ComplexFieldTest {
(i * 8).let { it.im.toInt() to it.re.toInt() }, (i * 8).let { it.im.toInt() to it.re.toInt() },
(Complex(2, 2) pow 2).let { it.im.toInt() to it.re.toInt() }) (Complex(2, 2) pow 2).let { it.im.toInt() to it.re.toInt() })
assertEquals(1.0, Complex(0.0).pow(Complex(0.0)).re, 0.01)
assertEquals(1.0, Complex(-0.0).pow(Complex(0.0)).re, 0.01)
assertEquals(0.0, Complex(0.0).pow(Complex(2.0)).re, 0.01)
assertEquals(0.0, Complex(-0.0).pow(Complex(2.0)).re, 0.01)
assertEquals(1.0, Complex(-1.0).pow(Complex(2.0)).re, 0.01)
assertEquals(2.0, power(Complex(-4.0, 0.0), 0.5 + 0 * i).im, 0.01) assertEquals(2.0, power(Complex(-4.0, 0.0), 0.5 + 0 * i).im, 0.01)
assertEquals(2.0, power(Complex(-4.0, 0.0), 0.5).im, 0.01) assertEquals(2.0, power(Complex(-4.0, 0.0), 0.5).im, 0.01)
} }