Alex Youcis

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12,560 reputation
1539
bio website drexel28.wordpress.com
location College Park, Maryland
age 22
visits member for 1 year, 9 months
seen 1 hour ago
stats profile views 1,639

I am currently a senior at University of Maryland, College Park.


352 Answers

newest activity votes
31
Books that every student “needs” to go through
dec 29 '11 at 0:22
28
Injective function that is not surjective
mar 4 at 20:58
22
Showing that $ \int_{0}^{1} \frac{x-1}{\ln(x)} \mathrm dt=\ln2 $
jan 19 '12 at 17:34
18
Should I be worried that I am doing well in Analysis and not well in Algebra?
apr 9 at 1:47
18
What are exact sequences, metaphysically speaking?
may 5 '12 at 2:29
16
What does $R-\mathrm{Mod}$ tell us about $R$?
mar 24 '12 at 23:23
14
Why do some people like analysis while others like algebra?
nov 3 '11 at 22:59
13
About the Order of Groups
may 7 '12 at 8:24
12
How do I show that $\int_{-\infty}^\infty \frac{ \sin x \sin nx}{x^2} \ dx = \pi$?
feb 7 '12 at 7:21
11
Prove that the group isomorphism $\mathbb{Z}^m \cong \mathbb{Z}^n$ implies that $m = n$
dec 9 at 7:35
11
Find every ring homomorphism between $\mathbb Z$ and $\mathbb Q$
apr 14 '12 at 21:35
10
How to calculate $|\operatorname {SL}_2(\mathbb Z/N\mathbb Z)|$?
mar 25 at 21:00
10
Is the derivative of a big-O class the same as the big-O class of the derivative?
dec 9 at 17:18
10
Is natural map $\operatorname{SL}_2(\mathbb{Z}) \to \operatorname{SL}_2(\mathbb{Z}/n\mathbb{Z}) $ surjective?
dec 28 '11 at 16:13
9
Prove: $\int_{0}^{\pi}\frac{x\tan x}{\sec x+\cos x}dx = \frac{\pi^{2}}{4}$
mar 26 at 3:38
9
$A\subset[0,1]$ with measure $<1$ so that $\int_A f(x) dx = \int_{[0,1]} f(x) dx$ for continuous $f$?
mar 6 at 15:53
9
$\lim_{x\rightarrow\infty}\frac{f(x)}{e^x}$ for analytic functions
feb 12 at 5:08
9
How can I prove that every group of $N = 255$ elements is commutative?
dec 10 at 13:35
9
Is set theory important for topology?
apr 13 '12 at 3:50
9
Prime ideals a very basic question
jan 19 '12 at 13:55
8
what are all the open subgroups of $(\mathbb{R},+)$
mar 11 at 2:06
8
Commutative ring $R$ such that $R[x]$ has nonconstant units.
feb 22 at 7:29
8
Motivation behind the definition of ideal class group
feb 6 at 6:11
8
Is it true that $\mathbb{R}$ and $\mathbb{R}^2$ are isomorphic as abelian groups?
may 14 '12 at 19:43
8
Integral related to $\sum\limits_{n=1}^\infty\sin^n(x)\cos^n(x)$
apr 19 '12 at 10:22
7
Let $G$ be a Lie group. Show that there is a diffeomorphism $TG \cong G \times T_e G$.
feb 20 at 4:45
7
Fun but serious mathematics books to gift advanced undergraduates.
dec 24 at 3:02
7
How to prove (or find) that a given group representation is irreducible?
apr 12 '12 at 4:52
7
Contour integral for $x^3/(e^x-1)$?
jan 17 '12 at 13:38
7
Examples of Galois connections?
jan 13 '12 at 18:39
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