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BUILT-IN MATHEMATICA SYMBOL
OneIdentity
OneIdentity
is an attribute that can be assigned to a symbol f to indicate that 
, 
, etc. are all equivalent to x for the purpose of pattern matching.
Details
- Functions like Plus and Times have the attribute OneIdentity.
- The fact that Times has attribute OneIdentity allows a pattern like
to match 
.
Examplesopen all
Basic Examples (1)
The pattern matches, because Times has attribute OneIdentity:
| In[1]:= |
| Out[1]= |  |
| In[2]:= |
| Out[2]= |  |
Any function with attribute OneIdentity will match:
| In[3]:= |
| In[4]:= |
| Out[4]= |  |
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