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 Aug22 comment Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? Hey is there any way to view old answers that have been deleted? I came back here to check something in the other method and someone seems to have deleted it again! Aug13 accepted Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? Aug13 comment Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? I don't think there's any harm in leaving up alternate answers - might help if it's easier for someone who thinks differently. Aug13 comment Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? Thanks for the comments, that definitely helps. As a matter of interest, what happened to the other answer? Did someone take it down? Aug13 comment Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? Thanks, can you explain why all of the orthonormal bases have this property or point me to some reference? Also, how would I systematically determine $\theta$? Aug13 revised Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? added 10 characters in body Aug13 asked Arbitrarily using Sin and Cos as eigenfunctions of a Hamiltonian? May2 awarded Supporter May1 awarded Editor May1 revised Can we proof $B=C^*$ given $|B-Ae^{-j\omega\delta}|=|C-Ae^{+j\omega\delta}|$ Minor Spelling/Grammar May1 suggested approved edit on Can we proof $B=C^*$ given $|B-Ae^{-j\omega\delta}|=|C-Ae^{+j\omega\delta}|$ May1 awarded Scholar May1 accepted A specific problem in changing the order of integrals. May1 comment A specific problem in changing the order of integrals. Hey, loving the Iverson bracket notation, thanks. May1 comment A specific problem in changing the order of integrals. Sorry I looked at it again, I see what you mean - I should really think before commenting! May1 comment A specific problem in changing the order of integrals. I'm sorry, but I'm not quite sure how we can assume that the domain is initially a right triangle? May1 awarded Student May1 asked A specific problem in changing the order of integrals.