Babak S.

27,922 reputation

21249

bio	website	facebook.com/bsorouh
	location
	age	41
visits	member for	2 years, 2 months
	seen	16 hours ago
stats	profile views	5,776

Counting is a less precise tool for infinite sets than for finite ones. The shepherdess who can count her flock of a hundred sheep will know if the wolf has taken one; but, if she has an infinite flock, she won't notice until almost all of her sheep have been lost.

enter image description here

Peter J. Cameron

All I am doing here as hints or answers, are dedicated to him.

	27,922 reputation	bio	website	facebook.com/bsorouh	visits	member for	2 years, 2 months
21249 badges		location			seen	16 hours ago

summary answers questions tags badges favorites bounties reputation activity

803 Answers

votes activity newest

20	How to compute $\sqrt{i + 1}$
15	Is there an easy way to calculate $\displaystyle\lim_{k \to \infty} \frac{(k+1)^5(2^k+3^k)}{k^5(2^{k+1} + 3^{k+1})}$?
14	Is this group abelian?
13	Show that $({\mathbb{Q}},+)$ is not finitely generated using the Fundamental Theorem of Finitely Generated Abelian Groups.
12	How do you graph $x + y + z = 1$ without using graphing devices?

27,922 Reputation

+5	Action of $S_7$ on the set of $3$-subsets of $\Omega$
+10	Being inside or outside of an ellipse
+10	worked conservative question. Can someone double check?
+10	Cardinality of Center of p Groups $ \|Z(G)\| \neq p^{n-1}$

155 Questions

votes activity newest

21	There are at most two prime numbers dividing $\|G\|$
21	Can $G≅H$ and $G≇H$ in two different views?
13	Fractals reference
12	The classification all finite groups which possess a single proper non-trivial normal subgroup
11	Contradiction! Any Symbol for?

162 Tags

462 group-theory × 250	158 linear-algebra × 60
402 calculus × 162	142 integral × 54
374 abstract-algebra × 143	127 limit × 46
336 homework × 127	116 sequences-and-series × 39
229 differential-equations × 90	113 integration × 38