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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.
Apr
4
answered If $F$ has characteristic $p$ and $f(x)=x^p-a\in F[x]$, then $f(x)$ is either irreducible over $F$ or $f(x)$ splits in $F$.
Apr
3
answered Prove a map is closed
Apr
3
answered F=F3[x]/(x3+2x-1) where F3 is the field with 3 elements then which of the following are correct
Apr
2
answered Prove there are no other invariant subspaces
Apr
2
answered Use the the division algorithm and the fact that $I= (\alpha)$
Mar
31
answered Can flooring and ceiling thirds sum up to more than a whole?
Mar
31
answered Kernel of biproduct projection is the other biproduct injection
Mar
31
answered From any ten naturals, find some numbers whose sum is divisible by $ 10.$
Mar
31
answered Prove that G\S generates G
Mar
31
answered Is there any way to test the existence of left or right inverse matrix?
Mar
15
answered Question about open mapping theorem
Mar
12
answered Method of finding a p-adic expansion to a rational number
Feb
22
answered Why is homeomorphism understood as stretching and bending?
Feb
19
answered Every subgroup of $\mathbb{Z}/n\mathbb{Z}$ is cyclic.
Feb
10
answered Rings and equations