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1d
revised Why is $R((X))$ defined as follows?
added 507 characters in body
1d
revised Are 0 and -1 the only rational periodic solutions of $z_{n}\equiv z_{n-1}^{2}+c$?
added 10 characters in body
2d
revised Why is $R((X))$ defined as follows?
added 253 characters in body
2d
revised Is the series $\sum_{n=1}^\infty\frac{n^n}{n!e^n}$ divergent?
added 766 characters in body
2d
revised Is the series $\sum_{n=1}^\infty\frac{n^n}{n!e^n}$ divergent?
added 766 characters in body
May
1
revised Why formulate continuity in terms of pre-images instead of image?
added 18 characters in body
Apr
30
revised Prove that there exists no prime
added 7 characters in body
Apr
29
revised A bipartite graph like $G(X,Y)$ such that $|X|=|Y|=k$ and $\delta(G) \gt \frac {k}{2}$ is Hamiltonian.
added 21 characters in body
Apr
28
revised Show that $\left | \sum_{k=1}^{m}a_k - \sum_{m+1}^{n}a_k \right| \leq \max|a_k|$
edited body; edited title
Apr
25
revised The $\cos(\alpha-\beta)$ formula always need $\alpha > \beta$ or not?
deleted 1 character in body
Apr
24
revised Algebraic description of $\frac1{x+y}$ in terms of $\frac1x$ and $\frac1y$ over finite field.
added 951 characters in body
Apr
24
revised Algebraic description of $\frac1{x+y}$ in terms of $\frac1x$ and $\frac1y$ over finite field.
added 2 characters in body; edited title
Apr
24
revised Creating a linear transformation $T$ such that $T$ is invariant in a proper subspace but not normal
added 4 characters in body
Apr
23
revised How to define such a non-constant, continuous $f(x)$ on $[a,b] \subset \mathbb R$
edited body
Apr
23
revised $0^0$ is undefined, but sometimes defined as $1$?
added 181 characters in body
Apr
22
revised Assuming $0 \leq a_{n+1} \leq c_n a_n + b_n$ (+ other conditions), show $a_n \to 0$
added 29 characters in body
Apr
22
revised Why is a polynomial $f(x)$ sum of squares if $f(x)>0 $ for all real values of $x$?
edited body
Apr
22
revised Prove continuity of a function from $S^n$ to $\Bbb R^n$
added 15 characters in body
Apr
19
revised Summation over a floor function of a first degree polynomial
added 11 characters in body
Apr
19
revised Find the product of $f(x)$ and $g(x)$ given one of them
added 143 characters in body