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14h
comment Sum of two normal numbers need not be a normal one
Actually, if one doesn't know what normal means one would not even guess that $d_i(\omega)$ denotes the $i$th binary digit of $\omega$ ...
14h
answered Prove or disprove $\mathbb{Q}[x] /(x^5-3) \cong \mathbb{Q}[x] /(x^5-9)$
14h
revised Find all odd positive integers $n$ greater than $1$ such that for any coprime divisors …
added 1025 characters in body
1d
comment Proving that $F_{kn}$ is a multiple of $F_n$ by induction on $n$ (Fibonacci numbers)
Yeah, make your choice so that the proof works ...
1d
answered What sequence of polynomials is equal to $2^n$ for integers $1$ to $k$?
1d
answered Find all odd positive integers $n$ greater than $1$ such that for any coprime divisors …
1d
comment Assumptions, Axioms and Premises
Maybe the attempt to make a somewhat formal distiction between these is as moot as for a distinction between lemma, proposition, theorem, corollary.
1d
awarded  Nice Answer
1d
answered The relation $\cong$ an equivalence relation on nonempty collection of groups $\mathcal{G}$
1d
comment Proof of infinite monkey theorem.
@AdityaAgarwal it is a theorem about a probability hence probabilty theory is the tool to use. Also, Borel-Cantelli is more or less equivalent to the infinite monkey theorem. The idea is to compare convergence of $1-\prod(1-p)$ with that of $\sum p$
1d
answered Is an empty parenthesis a valid mathematical expression?
1d
answered Largest eigenvalues of AA' equals to A'A
2d
revised “Convex” polynomials
edited body
2d
answered “Convex” polynomials
2d
answered shown that f is even
2d
answered How do I go about proving that an even function about x=0 has a derivative of 0?
2d
answered Use of brackets around the integrand
2d
answered Let $f:[0,\infty]\to R$ be differentiable on $(0, \infty)$, and $f'(x)\to b$ as $x \to \infty$. Show that $\lim_{x \to \infty}\frac{f(x)}{x}=b$
2d
comment Is there a symbol for “given” in mathematics?
Actually, I wouldn't use "given" in this context for the natural language version.
2d
revised Solutions for the following equation.
deleted 9 characters in body