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DOCUMENTATION CENTER SEARCH
Mathematica
>
Core Language
>
Defining Variables and Functions
>
Assignments
>
Built-in
Mathematica
Symbol
Values for Symbols
Making Definitions
Tutorials »
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Clear
TagUnset
Set
SetDelayed
See Also »
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Assignments
Language Overview
Mathematica Syntax
Defining Variables and Functions
More About »
Unset
(=.)
lhs
=.
removes any rules defined for
lhs
.
MORE INFORMATION
Rules are removed only when their left-hand sides are identical to
lhs
, up to renaming of patterns.
EXAMPLES
CLOSE ALL
Basic Examples
(2)
Undefine a value:
In[1]:=
In[2]:=
In[3]:=
Out[3]=
Undefine a function:
In[1]:=
In[2]:=
Scope
(2)
Properties & Relations
(1)
Possible Issues
(1)
SEE ALSO
Clear
TagUnset
Set
SetDelayed
TUTORIALS
Values for Symbols
Making Definitions
MORE ABOUT
Assignments
Language Overview
Mathematica Syntax
Defining Variables and Functions
New in 1
© 2008 Wolfram Research, Inc.
EXAMPLES
Basic Examples 
Scope 