Stack Exchange
sign up | log in |

Mathematics
  • Questions
  • Tags
  • Tour
  • Users
  • Ask Question

Steven Gubkin

less info
meta site favicon meta user | stack exchange network profile network profile
43 reputation
3
bio website
location
age
visits member for 11 months
seen Nov 19 '12 at 6:15
stats profile views 15

43 reputation
 bio website visits member for 11 months
3 badges
 location seen Nov 19 '12 at 6:15
summary answers questions tags badges favorites bounties reputation activity

2 Answers

votes activity newest
3
 An example for a calculation where imaginary numbers are used but don't occur in the question or the solution.
0
 Finding $\int_0^{\pi/2} \sin x\,dx$

43 Reputation

+30 An example for a calculation where imaginary numbers are used but don't occur in the question or the solution.
+10 The pointwise liminf of a sequence of upper semicontinuous functions is upper semicontinuous. Find the flaw in my counterexample?

1 Question

votes activity newest
2
 The pointwise liminf of a sequence of upper semicontinuous functions is upper semicontinuous. Find the flaw in my counterexample?

7 Tags

3
examples-counterexamples
0
integral
3
complex-numbers
0
calculus
3
teaching
0
trigonometry
0
real-analysis

3 Accounts

Mathematics Stack Exchange Mathematics 43 rep 3
Stack Overflow Stack Overflow 32 rep 5
Physical Fitness Stack Exchange Physical Fitness 11 rep 1

3 Badges

recent class name
 Teacher  Student
 Scholar

0 Active bounties

active offered earned
This user has no active bounties

0 Votes Cast

This user has not cast any votes
user feed
about faq badges blog chat data legal privacy policy jobs advertising info mobile contact us feedback
Technology Life / Arts Culture / Recreation Science Other
  1. Stack Overflow
  2. Server Fault
  3. Super User
  4. Web Applications
  5. Ask Ubuntu
  6. Webmasters
  7. Game Development
  8. TeX - LaTeX
  1. Programmers
  2. Unix & Linux
  3. Ask Different (Apple)
  4. WordPress Answers
  5. Geographic Information Systems
  6. Electrical Engineering
  7. Android Enthusiasts
  8. IT Security
  1. Database Administrators
  2. Drupal Answers
  3. SharePoint
  4. User Experience
  5. Mathematica
  6. more (14)
  1. Photography
  2. Science Fiction & Fantasy
  3. Seasoned Advice (cooking)
  4. Home Improvement
  5. more (13)
  1. English Language & Usage
  2. Skeptics
  3. Mi Yodeya (Judaism)
  4. Travel
  5. Arqade (gaming)
  6. Bicycles
  7. Role-playing Games
  8. more (22)
  1. Mathematics
  2. Cross Validated (stats)
  3. Theoretical Computer Science
  4. Physics
  5. more (7)
  1. Stack Apps
  2. Meta Stack Overflow
  3. Area 51
  4. Stack Overflow Careers
site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required
rev 2013.5.24.702