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Oct
18
asked Prove that $\mathcal B(\mathbb R)\times \mathcal B(\mathbb R)\subseteq \mathcal B (\mathbb R^2)$
Oct
18
answered Why isn't area under curve from 0 to infinity of $\frac{1}{x^2}$ equal to 3?
Oct
17
answered “Introducing something extra”
Oct
12
answered Adjusting weight of a body of water by substituting part of it with a lighter liquid
Oct
5
asked Is there a geometrical definition of a tangent line?
Oct
3
answered Is $x^{1-\frac{1}{n}}+ (1-x)^{1-\frac{1}{n}}$ always irrational?
Sep
22
answered Why doesn't the definition of the interior of a set depend on the dimension of the set
Sep
21
asked Are there Cantor sets of non-zero measure?
Sep
19
answered Symbol for unknown relation?
Sep
18
answered Searching for analytical or topological proof(s) of the Cayley-Hamilton theorem
Sep
16
answered Explanation of Cauchy's root test / criterion
Sep
16
answered In probability: is there a name for 1-x or x-1?
Sep
16
asked An algorithmic approach to constructing the real numbers
Sep
13
answered How to work out $-1 \bmod 7$?
Sep
1
asked Books on differential geometry in the cases $n=2$ and $n=3$
Aug
31
answered Check my proof of Lehmers conjecture
Aug
25
answered How to conclude $|a|<|b|$ from $a<\frac{b^2}{a} \text{ and } \frac{a^2}{b}<b$? (Direct Proof)
Aug
24
answered What is the relationship between dim(Im(T)) and dim(Im(T^2))
Aug
23
answered How to say the angle modulo $2\pi$
Aug
21
answered Reference for book on fundamental abstract algebra topics