Recent content by tan90ds

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    Graduate Problem on integrating dirac delta function

    This makes sense for why they put (x-x_0)\cos(\theta)+(y-y_0)\sin(\theta)=0 after the second line. Actually I am in the middle of proving the simple backprojection of the Radon transform of a dot can be viewed as a two dimensional convolution of \frac{1}{\sqrt{x^2+y^2}} and the original...
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    Graduate Problem on integrating dirac delta function

    Hi there, I am trying to integrate this: http://imm.io/oqKi I should get the second line from the integral, but I can't show it. This should somehow relate to the Heaviside step function, or I am completely wrong. Any ideas? Sorry about the url, I fixed it.