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3.1.2. Commands and Functions for Booleans
The following are commands and functions for booleans:

  * EqSet -- checks if the set of elements in two lists are equal
  * IsEven, IsOdd -- test whether an integer is even, odd, or zero
  * IsHomog -- test whether given polynomials are homogeneous
  * IsIn -- check if one object is contained in another
  * IsNumber -- checks if the argument is a number
  * IsPosTo, IsToPos -- checks the module term-ordering of a ring
  * IsZero -- test whether an object is zero
  * Not, And, Or -- boolean operators
  * SubSet -- checks if the elements of one list are a subset of another

Details can be found by looking up each item by name.  Online, try
'?ItemName' or 'H.Syntax("ItemName")'.