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Aug
14
comment Determinant of $ n \times n$ matrix and its characteristic polynomial.
@LSB.user255259. No, there is no useful way of making use of regularity.
Aug
14
answered Determinant of $ n \times n$ matrix and its characteristic polynomial.
Aug
13
revised If the coefficients of the y-terms are equal and the coefficients of the x-terms are equal, the graphs of the two lines will be parallel.
fixed tag
Aug
4
revised Determinant of M
deleted inappropriate tag
Jul
29
comment Eigenvalues of the product of two “incidence” matrices
$B^TB_d=B_d^TB_d$.
Jul
27
answered Confusion between spectral radius of matrix and spectral radius of the operator
Jul
24
comment different definitions of Hopf algebras
Also Hatcher assumes his algebra is graded, which is not standard.
Jul
20
revised what can you say about the solutions of the equation $y' = x^2+y^2$ just by looking at the differential equation
deleted wrong tag
Jul
19
comment Graph Theory:Folkman Graph
This is not an easy problem. If Jernej's suggestion does not suit you, your best starting point might be the original paper by Folkman.
Jul
18
revised Linear independence of matrix columns
typo in latex
Jul
2
reviewed Approve Find the volume common to two circular cylinders, each with radius r, if the axes of the cylinders intersect at right angles. (using disk/washer)
Jun
10
reviewed Approve When would a function be differentiable at the end point?
May
27
revised Size of the connected components
deleted inappropriate tag
May
23
answered The generating set of Cayley graphs over $Z_n$
May
12
comment Returning Paths on Cubic Graphs Without Backtracking
@draks: no problem
May
6
answered Eigen value of principal submatrix.
May
1
answered Eigen value and Regular Graph (not Strongly Regular graph).
Apr
27
comment Is there any relation between these matrices?
@sSry: well, for a start your question and ny answer refer to undirected graphs.
Apr
14
comment Can someone advice edge contraction tool?
Use a blackboard?
Apr
13
comment Extra Operation required for Smith Normal Form over PID-Theoretical Justification
You might get a better answer sooner if you say what your operations are.