singular point

noun Mathematics.
a point at which a given function of a complex variable has no derivative but of which every neighborhood contains points at which the function has derivatives.
Also called singularity.


Origin:
1885–90

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

singular point

of a function of the complex variable z is a point at which it is not analytic (that is, the function cannot be expressed as an infinite series in powers of z) although, at points arbitrarily close to the singularity, the function may be analytic, in which case it is called an isolated singularity. In general, because a function behaves in an anomalous manner at singular points, singularities must be treated separately when analyzing the function, or mathematical model, in which they appear.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Instead gravity would squeeze it down much further, perhaps even to a singular point.
It does not represent any singular point of view, but it does represent progress in this contentious area of public policy debate.
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