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Reopened Please consider voting to reopen this question: Peak response of second order system with rectangular pulse input The OP has improved it a lot.


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Undeleted Please consider undeleting this question. It is a nice instructive problem about a topic that deserves to be much better known and often proves troubling for students - namely Kronecker's ideas relating the factorization of polynomials to the factorization of their values. Because these ideas are so little known I can understand why the author ...


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Reopened I asked a question yesterday: Coupon collector's problem: mean and variance in number of coupons to be collected to complete a set This asks for the mean and variance of the coupon collector's problem in the general case when the coupons have unequal probability. It has been marked as a duplicate of this one: Expected time to roll all 1 ...


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Undeleted The following answer was deleted: https://math.stackexchange.com/a/1409573/10513 and I believe it should be undeleted. The question is rather old (2013). The context of the question is that they are reading a research article which states a result, and the question is asking for a proof of this. Each of the other answers gives a citation rather ...


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Please consider undeleting this post: Does the law of cosines contradict Pythagoras's theorem? It has been recently mentioned by Martin Sleziak in the CRUDE chat room and a user by GENTLE. As Henning Makholm's comment under the deleted post mentioned, "... the asker is wrong, but he's presenting his wrongness clearly in a way that makes it possible to ...


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