Gustavo Marra

less info

network profile

1,644 reputation

121

bio	website	facebook.com/…
	location	Brazil
	age
visits	member for	1 year, 2 months
	seen	5 hours ago
stats	profile views	368

Brazilian Math graduate student. Interested in differential topology, Riemann surfaces and dynamical systems.

summary answers questions tags badges favorites bounties reputation activity

62 Questions

votes activity newest

10	What's the idea of an action of a group?
9	A question about curves in $\mathbb{R}^2$
8	If $G$ is a group with order $364$, then it has a normal subgroup of order $13$
7	A question about the strict transform on blow-ups
7	Which languages are preferable to study for a mathematician?

view more

1,644 Reputation

+10	On the definition of divisors in Riemann Surfaces
+5	Which languages are preferable to study for a mathematician?
+5	A question about the strict transform on blow-ups
+5	Residue of a 1-form in a Riemann Surface does not depend of the chart

view more

35 Answers

votes activity newest

8	If $A^2$ is invertible, then $A$ is also invertible?
8	Solve the equation $x-7=28$
6	Silly question on radical
5	What is mathematical research like?
4	Quick question, does $\sin^2(4x) + \cos^2 (4x)$ equal 1?

view more

64 Tags

28 algebra-precalculus × 7	10 matrices × 2
24 homework × 22	8 inverse × 2
12 linear-algebra × 4	6 soft-question × 7
11 arithmetic × 2	5 multivariable-calculus × 15
11 problem-solving × 2	5 geometry × 2

view more

12 Accounts

$Mathematics Stack Exchange$	Mathematics	1,644 rep	121
	Philosophy	156 rep	5
	Academia	148 rep	3
	Home Improvement	101 rep	1
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	101 rep	1

22 Badges

recent class name

Caucus	Yearling
Talkative	Custodian
Peer Pressure	Citizen Patrol
Nice Question	Informed
Quorum	Analytical

view more

0 Active bounties

active offered earned

This user has no active bounties

172 Votes Cast

all time			by type			month
162	up		95	question		11
10	down		77	answer		11

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 2013.5.22.696