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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Laplacian_of_the_indicator entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-04-13 and was most recently seen on 2026-04-13.
In potential theory, the Laplacian of the indicator is obtained by letting the Laplace operator work on the indicator function of some domain D. It is a generalisation of the derivative of the Dirac delta function to higher dimensions; it is non-zero only on the surface of D. It can be viewed as a surface delta prime function, the derivative of a surface delta function. The Laplacian of the indicator is also analogous to the second derivative of the Heaviside step function in one dimension.
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