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Just Browsin'


1d
comment Are there more examples of functional equations which are also valid for the identity map?
Yeah, you are right. I knew this one though. Thanks for reminding me :)
2d
revised Are there more examples of functional equations which are also valid for the identity map?
Changed the question to make it more meaningful (Thanks Semiclassical)
Jul
28
comment Are there more examples of functional equations which are also valid for the identity map?
I think Semiclassical is more accurate than me. Can I edit my post and copy Semiclassicals version? Or is editing the question frowned upon?
Jul
27
asked Are there more examples of functional equations which are also valid for the identity map?
Jul
24
answered Number of distinct real roots with $e^{-x}$ in the equation
Jul
14
comment Exact probability of random graph being connected
I am curious. Can one invert the relation and find a formula for f(n) using this?
Jul
10
accepted A combinatorics question on a $n \times n$ grid
Jul
2
awarded  Curious
Apr
4
revised A combinatorics question on a $n \times n$ grid
edited title
Apr
4
comment A combinatorics question on a $n \times n$ grid
If somebody could suggest an appropriate title for this problem, I would appreciate the gesture. Thanks.
Apr
4
asked A combinatorics question on a $n \times n$ grid
Mar
26
answered Mutual information and Independence
Mar
26
comment Linear algebra, polynomial problem
What is q(1)? What is q'(1)?
Mar
18
comment How to prove that equality?
@BigM: How do we know $f^3(e) = f(e)$ for every $e \in E$?
Mar
17
accepted The properties of graph and its relation with the largest eigenvalue
Mar
14
comment The properties of graph and its relation with the largest eigenvalue
I can see that when the inequality, in the last but one line, hits with equality, the proof goes through. But why is $\sum |x_v| \le \triangle |x_u|$ for all $u$? I can see that for a u such that |x_u| is maximum. Thanks for the hints and sorry for being dense!
Mar
14
comment The properties of graph and its relation with the largest eigenvalue
But we have to prove that G is regular! Arent you assuming that G is regular?
Mar
14
comment The properties of graph and its relation with the largest eigenvalue
It is given that $\lambda_1 = \Delta$ and we have to prove that the all ones vector is an eigenvector. I am not able to understand how your argument does that. Would you kindly elaborate?
Mar
12
asked The properties of graph and its relation with the largest eigenvalue
Mar
7
comment The rational unit distance graph is bipartite
Yeah thanks, realized how to prove it.