t-tough

### Questions (11)

 9 Can $n!$ start with the digits 2020… 4 How far could you get in Graph Theory, whilst knowing almost nothing about almost all other fields? 3 Prime $Sun_{2}$-free bipartite graphs. Asked to prove a false statement? 2 Tree-width and Maximum Cliques of Triangulation - Confusion over proof. 2 Primes congruent to 1 modulo n

### Reputation (358)

This user has no recent positive reputation changes

 4 $(n+1)!>2^{(n+1)}$ for $n$, where $n \geq 4$. (Mathematical Induction) 1 Find the value of k such that P(X

### Tags (24)

 4 calculus 1 graph-theory × 10 4 matrices 1 discrete-mathematics × 2 4 real-analysis 1 integration 4 sequences-and-series 1 solution-verification 2 probability × 4 0 trees × 2

### Bookmarks (7)

 16 Number of grid points outside a rook circuit 13 Prove that connected graph $G$ with $\delta (G)\geq 3$ contains a cycle $C$ such that $G-E(C)$ is still connected. 4 If ${\lvert{E(G)}\rvert}>{\lvert{V(G)}\rvert}+3$, graph $G$ has at least two disjoint cycles. 4 What is the meaning of this Pigeon hole problem? 3 Find the condition in which $\angle ADB = 3\angle BAC$