3,915 reputation
1836
bio website sharif.academia.edu/…
location Tehran, Iran
age 25
visits member for 3 years, 4 months
seen 4 mins ago

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Aug
12
reviewed Approve suggested edit on How find this maximum and minimum of the value $\sum_{i=1}^{n-1}[x_{i+1}-x_{i}]$
Aug
10
reviewed Approve suggested edit on Gaussian Elimination method with respect to maximum XOR subset problem?
Aug
10
reviewed Approve suggested edit on $X = (X_1, X_2)$ is it not a multivariate random variable?
Jul
31
reviewed Approve suggested edit on Produce unique number given two integers
Jul
29
comment Free product as automorphism group of graph
But I prefer introduction to group theory by Oleg Bogopolski. It is very readable, and I guarantee it.
Jul
29
comment Free product as automorphism group of graph
@user1729 I have not seen this book, but I think the literature of this book is little bit strange. Isn't it?
Jul
29
comment Free product as automorphism group of graph
@user1729 I think by symmetries, he means a subgroup of automorphism of tree such that preserves the color of each part(preserves bipartite structure).
Jul
29
comment Why $ (1- \sin \alpha + \cos \alpha)^2 = 2 (1 - \sin \alpha)(1+ \cos \alpha)$?
$2 (1 - \sin\alpha + \cos\alpha - \sin\alpha\cos\alpha)=2 (1 + \cos\alpha -\sin\alpha - \sin\alpha\cos\alpha)=2 (1 + \cos\alpha -\sin\alpha(1+\cos\alpha))$. I moved the position of sin and switched with cos.
Jul
29
comment Why $ (1- \sin \alpha + \cos \alpha)^2 = 2 (1 - \sin \alpha)(1+ \cos \alpha)$?
It is a common factorization. where is it exactly your problem?
Jul
16
reviewed Approve suggested edit on How to calculate gradient of $x^TAx$
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
18
comment Question on Infinite Abelian Group
if G is countable, then I can give you a solution. But I do not see for uncountable group.
Jun
7
reviewed Reject suggested edit on Why is this subspectrum closed
Jun
1
reviewed Reject suggested edit on linear transformation $\Bbb R^3 \to \Bbb R^2$
May
23
reviewed Approve suggested edit on Differentiation problem - airplane/observer question
May
22
reviewed Approve suggested edit on Can anyone help me with these double Integrals using mathematica
May
22
reviewed Approve suggested edit on What is the number of ways of expressing $120$ as a difference of two perfect squares?
May
19
reviewed Approve suggested edit on Factorizing degree four polynomial
May
12
awarded  Yearling