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 Jun 8 awarded Constituent Jun 8 awarded Caucus Jun 8 awarded Popular Question Mar 17 awarded Yearling Mar 9 comment Which function's Fourier transform is the function itself? Also, have a look at the answers here. Feb 28 comment Is a good GRE score enough for a non-math graduate to be accepted in a decent pure mathematics graduate program? What comes under the purview of weak math background in your opinion? Non-math undergrad major? Math Major with weak scores? Would a non-math undergrad major (engg/physics) with strong scores in math courses count as weak? Thank you. Jan 12 awarded Nice Question Dec 9 comment Showing two matrices are similar Sorry,you all were right. I made a type in the third matrix Dec 9 accepted Showing two matrices are similar Dec 9 revised Showing two matrices are similar edited body Dec 9 comment Showing two matrices are similar @Henning Sorry. I am following a physics book and these matrices are actually representations. Two representations were defined to be equivalent if their matrices are related by a similarity transformation. This was what I had in my mind. Dec 9 comment Showing two matrices are similar Yes, I am sure. The first three matrices are what physicists call spin 1 representation. The final three matrices are the adjoint representation of SU(2) (excluding a phase factor of -i). The question is to show that the two representations are equivalent (a result which is used later to construct roots). I phrased only the computational part in my question. Dec 9 revised Showing two matrices are similar edited title Dec 8 asked Showing two matrices are similar Dec 1 accepted Regular polygons meeting at a point Nov 29 comment Regular polygons meeting at a point @J.M. But we're talking about polygons not polyhedrons. Nov 28 revised Regular polygons meeting at a point deleted 44 characters in body Nov 28 asked Regular polygons meeting at a point Nov 11 revised How many three digits even numbers can we form such that if one of digit is $5$ the following digit must be $7$? added 303 characters in body Nov 11 answered How many three digits even numbers can we form such that if one of digit is $5$ the following digit must be $7$?