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IsMinusOne    --    test whether an object is -1

Syntax

IsOne(X: OBJECT): BOOL

Description

This function tests whether its argument is -1; the argument can be of almost any type for which -1 makes sense.

Example

/**/ IsMinusOne(23); false /**/ IsMinusOne(3/-3); true /**/ use R ::= QQ[x,y,z]; /**/ IsMinusOne(-x/x); true

See Also

• IsOne