Removable Singularity
A removable singularity is a singular point 
of a function 
for which it is possible to assign a complex
number in such a way that 
becomes analytic. A more precise way of defining a removable
singularity is as a singularity 
of a function
about which the function 
is bounded.
For example, the point 
is a removable
singularity in the sinc function 
,
since this function satisfies 
.
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