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based on an earlier version of the Wolfram Language.
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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.
New in 6