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<math> F(s_1,s_2) </math> is called the image of <math> f(x,y) </math> and <math> f(x,y) </math> is known as the original of <math> F(s_1,s_2) </math>.{{cn|date=November 2019}} This special case can be used to solve the [[Telegrapher's equations]].{{cn|date=November 2019}}}
== Multidimensional Z transform ==
Source:<ref>{{Cite web|url = http://dsp-book.narod.ru/HFTSP/8579ch08.pdf|title = Narod Book}}</ref> The multidimensional Z transform is used to map the discrete time ___domain multidimensional signal to the Z ___domain. This can be used to check the stability of filters. The equation of the multidimensional Z transform is given by
[[File:Figure 1.1a depicting region of support.png|thumb|209x209px|Figure 1.1a]]
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