# What is the definition of Cauchy function associated with the differential or difference equations?

What is the definition of Cauchy function associated with the differential or difference equations? Where can I find the details?

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do you mean the cauchy-euler equation? –  DanZimm Nov 5 '12 at 8:38
No, I mean the Cauchy function x(t,s) which is useful to find the Green function of the differential or difference equations. –  mzll2008 Nov 5 '12 at 23:42
oop, thats outa my knowledge range sorry for protruding –  DanZimm Nov 6 '12 at 4:08
Thank you all the time. –  mzll2008 Nov 6 '12 at 13:48