Package org.apache.commons.numbers.core
Interface Multiplication<T>
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- Type Parameters:
T- Type of elements.
- All Known Subinterfaces:
NativeOperators<T>
- All Known Implementing Classes:
DD
public interface Multiplication<T>
Multiplication.
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description default booleanisOne()Check if this is a neutral element of multiplication, i.e.Tmultiply(T a)Binary multiplication.Tone()Identity element.Treciprocal()Multiplicative inverse.
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Method Detail
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one
T one()
Identity element.- Returns:
- the field element such that for all
a,one().multiply(a).equals(a)istrue.
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reciprocal
T reciprocal()
Multiplicative inverse.- Returns:
this-1.
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isOne
default boolean isOne()
Check if this is a neutral element of multiplication, i.e.this.multiply(a)returnsaor an element representing the same value asa.The default implementation calls
equals(one()). Implementations may want to employ more a efficient method. This may even be required if an implementation has multiple representations ofoneand itsequalsmethod differentiates between them.- Returns:
trueifthisis a neutral element of multiplication.- Since:
- 1.2
- See Also:
one()
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