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4h
comment What are some good resources to study Cryptography?
If you enjoy abstract algebra, Koblitz's books Algebraic Aspects of Cryptography and A Course in Number Theory and Cryptography might be interesting to you.
1d
awarded  Revival
1d
comment What the's contradiction in showing the regular representation is indecomposable in characteristic $p$?
You can't prove that the two Ms must have trivial submodules otherwise
1d
answered What the's contradiction in showing the regular representation is indecomposable in characteristic $p$?
1d
answered A prime order group must be cyclic
1d
revised Where is Cauchy's wrong proof?
deleted 93 characters in body
2d
reviewed Approve Show that a positive definite (not necessarily symmetric) matrix induces a hyperellipse
2d
reviewed Approve How to solve polynomial-exponential equation
2d
revised Where is Cauchy's wrong proof?
added 902 characters in body
2d
comment Where is Cauchy's wrong proof?
merci à LeGrandDODOM pour les corrections :)
2d
awarded  Cleanup
2d
revised Where is Cauchy's wrong proof?
added 902 characters in body
2d
revised Where is Cauchy's wrong proof?
rolled back to a previous revision
2d
answered Where is Cauchy's wrong proof?
Apr
24
awarded  Pundit
Apr
23
comment Prove that $\lim_{x \to a} \big[ f(x)+g(x)\big] = p+q$
Your definition of limit is wrong. It shouldn't be if and only if!
Apr
23
reviewed Approve Naive Set Theory by Halmos is confusing to a layman like me
Apr
23
comment Vector space identity from Chow's “You Could Have Invented Spectral Sequences”
Then the answer is "yes, this is correct" ;)
Apr
23
revised Vector space identity from Chow's “You Could Have Invented Spectral Sequences”
added 165 characters in body
Apr
23
answered Vector space identity from Chow's “You Could Have Invented Spectral Sequences”