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Can anyone help me with the given integration

Integrate[Exp[- (2  \[Pi]  S  Abs[x-y])/B]* Cos[(2  \[Pi]  S)*(x-y)]* Sin[1 \[Pi] x]Sin[1 \[Pi] y],{x,.001,1}, {y,.001,1}]

Where S and B are input numbers and x and y are variables of integration

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POSTED BY: Bruce Miller
Posted 11 years ago

I stopped Integrate after quite a while -- there may be no closed form for this integral. However, NIntegrate will deliver a number, given values for s and b.

nint[s_, b_] :=
 NIntegrate[
  Exp[-(2 \[Pi] s Abs[x - y])/b]*Cos[(2 \[Pi] s)*(x - y)]*
   Sin[1 \[Pi] x] Sin[1 \[Pi] y], {x, .001, 1}, {y, .001, 1}]

p1 = Plot3D[nint[s, b], {s, 0, 2}, {b, 0, 2}, AxesLabel -> {"S", "B"}]

enter image description here

POSTED BY: David Keith
Posted 11 years ago
POSTED BY: David Keith
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