DOCUMENTATION CENTER SEARCH
Mathematica
>
Testing Expressions
>
Built-in
Mathematica
Symbol
SameQ
Equal
Simplify
FullSimplify
N
ZeroTest
See Also »
|
Formula Manipulation
Testing Expressions
New in 6.0: Symbolic Computation
New in 6.0: Mathematics & Algorithms
More About »
PossibleZeroQ
PossibleZeroQ
[
expr
]
gives
True
if basic symbolic and numerical methods suggest that
expr
has value zero, and gives
False
otherwise.
MORE INFORMATION
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.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
Test whether a numeric expression is zero:
In[1]:=
Out[1]=
Test whether a symbolic expression is likely to be identically zero:
In[2]:=
Out[2]=
Scope
(4)
Options
(2)
Applications
(1)
Properties & Relations
(1)
Possible Issues
(1)
SEE ALSO
SameQ
Equal
Simplify
FullSimplify
N
ZeroTest
MORE ABOUT
Formula Manipulation
Testing Expressions
New in 6.0: Symbolic Computation
New in 6.0: Mathematics & Algorithms
New in 6
© 2008 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
Scope 