Added degreeBy
to Numbered...
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@ -471,6 +471,18 @@ public open class NumberedPolynomialSpace<C, A : Ring<C>>(
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}
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}
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}
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/**
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* Counts degree of the polynomial by the specified [variable].
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*/
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public fun NumberedPolynomial<C>.degreeBy(variable: Int): UInt =
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coefficients.entries.maxOfOrNull { (degs, c) -> if (c.isZero()) 0u else degs.getOrElse(variable) { 0u } } ?: 0u
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/**
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* Counts degree of the polynomial by the specified [variables].
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*/
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public fun NumberedPolynomial<C>.degreeBy(variables: Collection<Int>): UInt =
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coefficients.entries.maxOfOrNull { (degs, c) ->
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if (c.isZero()) 0u else degs.withIndex().filter { (index, _) -> index in variables }.sumOf { it.value }
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} ?: 0u
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/**
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* Count of variables occurring in the polynomial with positive power. If there is no such variable,
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* the result is `0`.
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@ -126,6 +126,14 @@ public class NumberedRationalFunctionSpace<C, A: Ring<C>> (
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* And last index of the list is [lastVariable].
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*/
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public val NumberedPolynomial<C>.degrees: List<UInt> get() = polynomialRing { degrees }
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/**
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* Counts degree of the polynomial by the specified [variable].
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*/
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public fun NumberedPolynomial<C>.degreeBy(variable: Int): UInt = polynomialRing { degreeBy(variable) }
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/**
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* Counts degree of the polynomial by the specified [variables].
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*/
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public fun NumberedPolynomial<C>.degreeBy(variables: Collection<Int>): UInt = polynomialRing { degreeBy(variables) }
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/**
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* Count of variables occurring in the polynomial with positive power. If there is no such variable,
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* the result is `0`.
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