-y
x-y
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If one of the inputs is an RRi, the output is an interval containing all differences of pairs in the inputs.
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This operator may be used as a binary operator in an expression like x-y. The user may install binary methods for handling such expressions with code such as
X - Y := (x,y) -> ...
where X is the class of x and Y is the class of y.
This operator may be used as a prefix unary operator in an expression like -y. The user may install a method for handling such expressions with code such as
- Y := (y) -> ...
where Y is the class of y.