David Speyer

less info

network profile

807 reputation

513

bio	website
	location
	age
visits	member for	1 year
	seen	22 hours ago
stats	profile views	55

Associate professor of math at UMich, very active on Mathoverflow.

summary answers questions tags badges favorites bounties reputation activity

8 Answers

votes activity newest

15	Is there a clean way to extract the subspaces invariant under a list of matrices?
14	What are the most common pitfalls awaiting new users?
8	How can I rationalize the denominator of an expression?
6	Which DirichletCharacter is KroneckerSymbol?
6	Testing for primality in quadratic rings?

view more

807 Reputation

+115	FourierSeries for rational function looks wrong
+20	Which DirichletCharacter is KroneckerSymbol?
+20	Testing for primality in quadratic rings?
+5	Why is Flattening a CoefficientArray so slow?

view more

4 Questions

votes activity newest

11	Why can't I use Sequence to perform a Select like task?
5	How to express the original ideal elements in the Groebner basis?
4	Why is Flattening a CoefficientArray so slow?
0	Manipulate[]'ing complex roots of an equation using a 2D slider [closed]

21 Tags

15 linear-algebra	6 prime-numbers
12 number-theory × 2	5 implementation-details
9 functions × 2	5 bugs
8 algebraic-manipulation	5 fourier-analysis
6 complex × 2	4 matrix

view more

12 Accounts

$Mathematics Stack Exchange$	Mathematics	18,549 rep	14793
	Mathematica	807 rep	513
	Meta Stack Overflow	396 rep	27
	Theoretical Computer Science	163 rep	5
	Area 51	156 rep	1

13 Badges

recent class name

Yearling	Nice Question
Necromancer × 3	Disciplined
Nice Answer × 2	Enlightened
Revival × 3	Editor
Commentator	Teacher

view more

0 Active bounties

active offered earned

This user has no active bounties

136 Votes Cast

all time			by type			month		week
136	up		47	question		20		20
0	down		89	answer		20		20

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

Mathematica is a registered trademark of Wolfram Research, Inc. While the mark is used herein with the limited permission of Wolfram Research, Stack Exchange and this site disclaim all affiliation therewith.