Souvik Dey

less info

network profile

1,172 reputation

114

bio	website	google.co.in
	location
	age
visits	member for	8 months
	seen	May 13 at 3:56
stats	profile views	209

" The moving power of mathematical invention is not reasoning but imagination. "

— Augustus De Morgan

summary answers questions tags badges favorites bounties reputation activity

46 Questions

votes activity newest

10	If $f:\mathbb{R}\to\mathbb{R}$ is continuous and $f(x)\neq x$ for all $x$, must it be true that $f(f(x))\neq x$ for all $x$?
7	$f(x+y) + f( f(x) + f(y) ) = f( f( x+f(y) ) + f( y+f(x) ) )$
6	$\frac{a+b}{b+c} + \frac{c+d}{d+a} ≤ 4(\frac{a+c}{b+d}) ; a , b , c , d ∈ [1 , 2]$
6	Question about an upper bound
5	To estimate $\sum_{m=1}^n \Big(d\big(m^2\big)\Big)^2$

view more

1,172 Reputation

+15	To calculate $ \lim_{n\to \infty} \Big(\sum_{m=1}^r (a_m)^n\Big)^{1/n}$
+5	A question about digital sum of polynomials over $\mathbb Z^+$
+2	Which probability law?
+10	Prove by mathematical induction for any prime number$ p > 3, p^2 - 1$ is divisible by $3$?

view more

23 Answers

votes activity newest

6	$f(x+y) + f( f(x) + f(y) ) = f( f( x+f(y) ) + f( y+f(x) ) )$
5	Primes and Twine primes and their sums.
4	Simple inequality on real numbers
4	Need hint: Determine whether the series $\sum_{n=1}^{\infty}(\frac{n}{n+1})^{n^2}$ is convergent or divergent.
2	Prove by mathematical induction for any prime number$ p > 3, p^2 - 1$ is divisible by $3$?

view more

49 Tags

8 functional-equations × 6	5 prime-twins
7 inequality × 12	4 sequences-and-series × 8
7 prime-numbers × 5	2 triangle × 3
5 number-theory × 11	2 functions × 3
5 algebra-precalculus × 3	2 linear-algebra × 2

view more

1 Account

$Mathematics Stack Exchange$

Mathematics

1,172 rep

114

15 Badges

recent class name

Nice Question	Suffrage
Custodian	Vox Populi
Strunk & White	Self-Learner
Excavator	Critic
Organizer	Editor

view more

0 Active bounties

active offered earned

This user has no active bounties

200 Votes Cast

all time			by type			month
197	up		84	question		9
3	down		116	answer		9

Technology			Life / Arts	Culture / Recreation	Science	Other
Stack Overflow Server Fault Super User Web Applications Ask Ubuntu Webmasters Game Development TeX - LaTeX	Programmers Unix & Linux Ask Different (Apple) WordPress Answers Geographic Information Systems Electrical Engineering Android Enthusiasts IT Security	Database Administrators Drupal Answers SharePoint User Experience Mathematica more (14)	Photography Science Fiction & Fantasy Seasoned Advice (cooking) Home Improvement more (13)	English Language & Usage Skeptics Mi Yodeya (Judaism) Travel Arqade (gaming) Bicycles Role-playing Games more (22)	Mathematics Cross Validated (stats) Theoretical Computer Science Physics more (7)	Stack Apps Meta Stack Overflow Area 51 Stack Overflow Careers

site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required

rev 2013.5.17.690