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Aug
26
awarded  Citizen Patrol
Aug
26
revised As of August 2015, is the “set” of all gold medalists in the 2016 Olympics a set?
expand on time dependent sets to get more downvotes from logicians
Aug
26
comment As of August 2015, is the “set” of all gold medalists in the 2016 Olympics a set?
@CarlMummert I understand that you want to drag this question into logic, but as a "working mathematician" I would just define a time dependent set as a map from $\mathbb{R}$ to sets. I'll update my answer.
Aug
26
comment As of August 2015, is the “set” of all gold medalists in the 2016 Olympics a set?
So you have conclusively argued that the question should be closed as "not clear what you are asking"?
Aug
26
comment $P$ is a monic polynomial of degree $n$ , then which are correct?
Err, yes. This is funny.
Aug
26
comment $P$ is a monic polynomial of degree $n$ , then which are correct?
You should at least mention the mean value theorem :)
Aug
26
comment Ternary Tree of Pythagorean triples
Could you explain what a Fibonacci box is and how the first box creates three more boxes? I think this is not standard.
Aug
25
awarded  Explainer
Aug
25
revised When is $(a+b)^n \equiv a^n+b^n$?
corrected grammer.
Aug
25
revised When is $(a+b)^n \equiv a^n+b^n$?
expand on binomial theorem.
Aug
25
suggested approved edit on When is $(a+b)^n \equiv a^n+b^n$?
Aug
25
answered When is $(a+b)^n \equiv a^n+b^n$?
Aug
25
answered Ergodic components of Markov chain by transition matrix
Aug
25
comment Ergodic components of Markov chain by transition matrix
I still don't understand the question: For irreducible Markov chains on a finite state space we have the ergodic theorem (this is basic stuff in any book on finite state space Markov chains). So the question is equivalent to computing the strong connected components which can be done in linear time: en.wikipedia.org/wiki/Strongly_connected_component ?
Aug
25
answered Proving the Ideal Generated by the Coefficients of $f(X)\cdot g(X)\in R[X]$ is $R$.
Aug
25
comment Proving the Ideal Generated by the Coefficients of $f(X)\cdot g(X)\in R[X]$ is $R$.
Hmm, you put a question mark after your answer, but still, where is the question?
Aug
25
answered As of August 2015, is the “set” of all gold medalists in the 2016 Olympics a set?
Aug
25
comment Ergodic components of Markov chain by transition matrix
Please clarify "ergodic component". Is the state space finite, time discrete?
Aug
25
answered Matrix tensor indices
Aug
19
revised How many elements does this ring have?
Fix many problems.