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Mathematica > Testing Expressions >

Built-in Mathematica Symbol

PossibleZeroQ

PossibleZeroQ[expr]
gives True if basic symbolic and numerical methods suggest that expr has value zero, and gives False otherwise.

The general problem of determining whether an expression has value zero is undecidable; PossibleZeroQ provides a quick but not always accurate test.

With the setting Method->"ExactAlgebraics", PossibleZeroQ will use exact guaranteed methods in the case of explicit algebraic numbers.

Test whether a numeric expression is zero:

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