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Jul
19
asked Are there noncontinuous derivations $C^1(X) → ℝ$?
Jul
5
asked Characterization of the space of integrable functions stable under multiplication
Jun
21
asked A good book on humankind’s understanding of primes?
Jun
14
asked Justifying the integral identity “$\int \mathrm{e}^{cx} \sin bx\, \mathrm{d}x = \frac{\mathrm{e}^{cx}}{b^2 + c^2}(c \sin bx - b \cos bx)$”
May
23
asked Are binomial series multiplicative in their bases?
May
21
answered Proving that the ball is converx
May
7
answered Existence of a holomorphic function with the desired property
May
7
asked Connected spaces where all subsets are either open or closed
May
6
answered Why does an isomorphism need to be a homomorphism?
Apr
30
answered If $H$ is a cyclic group of even order, $H$ has exactly two elements which square to $1.$
Apr
27
answered Ring Homomorphism Defintion
Apr
26
asked What are the fixed points of $f_ c = c · \sin$ for $c > 1$?
Apr
26
answered Show that $B/Q$ is integral over $A/P$
Apr
25
answered Remember the implicit function theorem
Apr
25
answered $\dim (W_{1} \cap W_{2}) = \dim W_{1}$ implies $W_{1} \subset W_{2}$?
Apr
11
answered about hyperplanes in finite fields
Apr
8
asked Why are functors exact if they preserve all short exact sequences?
Apr
6
answered Relative homotopy and composition of maps
Apr
6
answered the number of inversions in the permutation “reverse”
Apr
4
answered Let $\alpha\in R$. Prove that $\mathbb Q(\alpha)\cong\mathbb Q(x)$ iff $\alpha$ is transcendental.