# Inhomogeneous Helmholtz equation/Related Articles

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## Parent topics

- Mathematics [r]: The study of quantities, structures, their relations, and changes thereof.
^{[e]} - Physics [r]: The study of forces and energies in space and time.
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## Subtopics

- Convolution (mathematics) [r]: A process which combines two functions on a set to produce another function on the set: the value of the product function depends on a range of values of the argument.
^{[e]} - Differential equation [r]: An equation relating a function and its derivatives.
^{[e]} - Free space (electromagnetism) [r]: In classical electromagnetism, the vacuum reference state with no fields or particles; in quantum mechanics, the vacuum state with electromagnetic fields fluctuating about an average value of zero.
^{[e]} - Fourier transform [r]: Decomposition to the sum or integral of functions.
^{[e]} - Green's function [r]: Auxiliary function in the theory of linear differential equations; integral operator with Green function as kernel is the inverse of a linear differential operator.
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