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Mathematics
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DoubleV
  • Member for 2 years, 10 months
  • Last seen this week
  • Budapest, Hungary
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pretty sure I know nothing at this point :)

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question
7
How to tell when a degree sequence has a unique unlabelled graph
Nov 11, 2023
question
4
Need help choosing delta to prove continuity for $f(x)=\frac1x$ at $x=\frac12$ in a piecewise function.
Dec 14, 2022
question
3
Proving a function g: R^2 → {(x,y):x^2+y^2 ≤ 1} is injective. (function given in comments).
Nov 4, 2021
question
3
Prove any polygonal function is a finite sum.
Dec 14, 2022
question
3
Proving an acyclic subgraph of a connected graph can be completed into a spanning tree of the graph
Nov 17, 2023
answer
3
DFA and regular expressions
Oct 11, 2023
question
2
Prove or disprove: If $a_n$ is Cauchy, is $\lfloor a_n \rfloor$ Cauchy?
Oct 9, 2022
question
2
Finding the maximal graphs to find the Ramsey number $R(P_4,C_7)$
Dec 5, 2023
question
2
Bertrand's postulate to show $\frac1n+\frac1{n+1}+\cdots+\frac1{n+m}\notin\mathbb Z$ for all positive integers $n$ and $m$.
Feb 8
question
1
Proof help: $\inf_m a_m + \inf_n b_n \leq \inf_n (a_n+b_n)$ and $\inf_m a_m + \inf_n b_n = \inf _{m,n} a_m + b_n$
Sep 16, 2022