Monday, 18 June 2018

calculus - Evaluating dfrac12piintiinftynftyintiinftynftyetuveu2/2ev2/2dudv



Solving a probability problem I came across this integral:




12πetuveu2/2ev2/2 du dv





Can you explain how to integrate this?


Answer



Hint. Assume $-1gaussian result,
etuveu2/2 du=2πet2v2/2

then with respect to v,
et2v2/2ev2/2 dv=e(1t2)v2/2 dv=2π1t2
obtaining




12πetuveu2/2ev2/2 du dv=11t2.



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