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comment Why this $\sigma \pi \sigma^{-1}$ keeps apearing in my group theory book? (cycle decomposition)
I second @Kaj on this.
Aug
1
comment How is the distinction of left and right in space related to the orientation of screw?
It is a left screw. Consider a line moving out vertically in front of you (like if your nose became really long). What happens to this line if you rotate clockwise?
Jul
31
answered How is the distinction of left and right in space related to the orientation of screw?
Jul
29
comment Good books and lecture notes about category theory.
He was probably joking.
Jul
18
asked Can two non-abelian groups have an abelian product or coproduct?
Jul
13
awarded  Excavator
Jul
13
revised Self-contained undergrad math resources for someone with extremely weak foundations in math?
fixed title
Jul
13
suggested approved edit on Self-contained undergrad math resources for someone with extremely weak foundations in math?
Jul
13
comment Self-contained undergrad math resources for someone with extremely weak foundations in math?
Someone is bound to come in and start waxing lyrical about Rudin (or even Switzer).
Jul
13
revised Elegant applications of advanced techniques to “olympiad” problems
added 146 characters in body
Jul
13
comment Elegant applications of advanced techniques to “olympiad” problems
Try posting an answer using something from there. The "pauper's coat" inequality from Engel, perhaps (if this is the same probabilistic method handout I recall reading)?
Jul
13
comment Elegant applications of advanced techniques to “olympiad” problems
I have found Bertrand useful in a few cases, indeed, although I can't remember any particular one. Perhaps you could post an answer with a specific example?
Jul
13
revised Elegant applications of advanced techniques to “olympiad” problems
added 115 characters in body
Jul
13
revised Elegant applications of advanced techniques to “olympiad” problems
added 139 characters in body
Jul
13
comment Elegant applications of advanced techniques to “olympiad” problems
Thank you, I didn't know this.
Jul
13
asked Elegant applications of advanced techniques to “olympiad” problems
Jul
13
answered Elegant applications of advanced techniques to “olympiad” problems
Jul
11
accepted Any deeper “duality” between non-zero-divisors and units of a ring?
Jul
11
comment Any deeper “duality” between non-zero-divisors and units of a ring?
@rschwieb, I'll definitely look those up. Thanks.
Jul
10
comment Any deeper “duality” between non-zero-divisors and units of a ring?
@MartinBrandenburg, I've edited it. Does the question make a little more sense now?