252 reputation
17
bio website problemania.org
location Problemania
age
visits member for 3 years
seen Aug 24 at 23:51

A moderator at Wiki site http://problemania.org where a group of enthusiasts enjoying sharing the fun solving mathematics, physics, and computing problems. We primarily work on problems found in college/grad school text books.

Web page: http://problemania.org

Twitter: http://twitter.com/#!/problemania

Github: https://github.com/Problemaniac


Aug
12
accepted What's the relationship between uncertainty principle and symplectic groups?
Aug
11
asked What's the relationship between uncertainty principle and symplectic groups?
Aug
10
comment QM without complex numbers
Could you elaborate on the statement about $U(n)$, $Sp(2n, \mathbb{R})$, $O(n)$, $GL(n, \mathbb{C})$?
Jun
29
asked How do two rigid bodies with different 3rd moment of inertia rotate differently?
Jun
19
asked Pedagogical projects in QFT for self-study purposes?
Mar
12
awarded  Popular Question
Aug
26
awarded  Yearling
Jan
21
accepted How a spacecraft travelling near light speed avoid asteroids?
Jan
21
accepted How does one explain this pattern generated by earthquake waving driving a pendulum?
Jan
17
accepted What's the isospin of photons?
Jan
17
revised Please recommend a physics problems book similar to Demidovich
added 119 characters in body
Jan
16
revised How does one explain this pattern generated by earthquake waving driving a pendulum?
better wording
Jan
16
asked How does one explain this pattern generated by earthquake waving driving a pendulum?
Jan
12
comment What are the consequences of relativistic angular velocities?
Angular velocity $\omega$ has different dimension from light speed $c$, hence can't really approach it. You want $\omega \rightarrow c r$?
Jan
12
asked How a spacecraft travelling near light speed avoid asteroids?
Dec
5
asked What's a compact scientific answer to question “(Why there is) / (what is before) the Big Bang?”
Sep
11
awarded  Commentator
Jul
21
accepted What does the latin letter mean in Bayer name of a star such as “$\Upsilon$ Andromedae $b$”?
Jul
21
awarded  Supporter
Jul
21
comment What does the latin letter mean in Bayer name of a star such as “$\Upsilon$ Andromedae $b$”?
So $\Upsilon$ Andromedae is a multiple star system?