draks ...
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 Apr 11 asked Tests for my “LineGraph-from-AdjacencyMatrix” function Mar 31 answered Is there a transitive property for undirected graph paths? Mar 31 answered Who found the expression $n^2 - n + 41$ for generating prime numbers? Mar 30 answered Is it possible to express a vector using cross product with another vector? Mar 30 answered Sum problem $S_n=1q+8q^2+27q^3+ … +n^3q^n$ Mar 30 answered A task about Bipartite Graph Mar 30 answered vertex that can reach every other vertex in the graph, imply every vertex can reach each other? Mar 30 asked Provable Hamiltonian Subclass of Barnette Graphs Mar 29 answered Can every function be represented as polynomial Mar 29 answered Closed form for $L$ in $LL^T=XX^T-Diag(XX^T)$ Mar 29 answered Multinomial Coefficients Confusion Mar 29 asked Get rid of for loops to construct $L$ Mar 14 asked Solution for sets of $(x_k-x_l)(x_l-x_m)(x_m-x_k)>0$ Mar 4 asked How to prove $\small 2\sin{(2m+1)x} -\sin{(2m-1)x}=\sin{x}\left(1+2\cos{(2mx)}+2\sum\limits_{k=1}^{m}\cos{(2kx)}\right)$? Mar 3 asked Is the cycle space of a planar bicubic graph an algebraic variety? Feb 29 answered Petersen graph is tripartite Feb 23 answered Which derivatives are eventually periodic? Feb 19 asked A triangle, two squares, five pentagons and $x$ hexagons met in the plane… Feb 17 answered Test diagonalizability of $T(A)=A^t$ over all $n\times n$ matrices Feb 15 answered How many vertices do you need so that all squares are not directly connected?