Package org.apache.commons.numbers.core
Interface Multiplication<T>
- Type Parameters:
T
- Type of elements.
- All Known Subinterfaces:
NativeOperators<T>
- All Known Implementing Classes:
BigFraction
,DD
,FP64
,Fraction
public interface Multiplication<T>
Multiplication.
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Method Summary
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Method Details
-
multiply
Binary multiplication.- Parameters:
a
- Element.- Returns:
this * a
.
-
one
T one()Identity element.- Returns:
- the field element such that for all
a
,one().multiply(a).equals(a)
istrue
.
-
reciprocal
T reciprocal()Multiplicative inverse.- Returns:
this-1
.
-
isOne
default boolean isOne()Check if this is a neutral element of multiplication, i.e.this.multiply(a)
returnsa
or 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 ofone
and itsequals
method differentiates between them.- Returns:
true
ifthis
is a neutral element of multiplication.- Since:
- 1.2
- See Also:
-