jandrew

less info

network profile

150 reputation

29

bio	website
	location
	age
visits	member for	10 months
	seen	2 hours ago
stats	profile views	16

summary answers questions tags badges favorites bounties reputation activity

5 Questions

votes activity newest

4	Finitely generated singular homology
2	Every compact orientable surface with $S^1\times\{0\}$ as its boundary intersects the $z$-axis
1	Every subgroup of finite rank of $\mathbb Z^\mathbb N$ is free abelian
1	Special case for Alexander's Duality
1	Finding an example for $ Hom\left ( \prod A_{j} ,B\right )\ncong \prod Hom\left ( A_{j} ,B\right ) $

150 Reputation

+25	Show that curvature and torsion are $κ = \frac{\|γ' ∧γ''\|}{\|γ'\|^3}$ and $\tau = \frac{\|γ' ∧γ''\|.γ'''}{\|γ' ∧γ''\|^2}$
+2	the normal curvature for torus
+5	Finitely generated singular homology
+15	The Gaussian and Mean Curvatures of a Parallel Surface

view more

2 Answers

votes activity newest

2	Show that curvature and torsion are $κ = \frac{\|γ' ∧γ''\|}{\|γ'\|^3}$ and $\tau = \frac{\|γ' ∧γ''\|.γ'''}{\|γ' ∧γ''\|^2}$
1	The Gaussian and Mean Curvatures of a Parallel Surface

9 Tags

3 differential-geometry × 3	0 algebraic-topology × 2
3 homework × 3	0 compact-manifolds
1 surfaces	0 group-theory
0 modules × 2	0 homological-algebra
0 abstract-algebra × 2

2 Accounts

$Mathematics Stack Exchange$	Mathematics	150 rep	29
	Physics	1 rep

11 Badges

recent class name

Constituent	Organizer
Caucus	Supporter
Analytical	Enthusiast
Commentator	Student
Teacher	Scholar

view more

0 Active bounties

active offered earned

This user has no active bounties

24 Votes Cast

all time			by type
24	up		12	question
0	down		12	answer

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 Christianity Arqade (gaming) Bicycles Role-playing Games more (21)	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 2013.6.17.742