413 reputation
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visits member for 3 years, 1 month
seen Mar 7 at 12:44

Jul
2
awarded  Curious
Jan
29
awarded  Yearling
Oct
13
asked Can I approximate sine and cosine without derivatives?
Aug
12
revised A set of the plane recursively including “crosses”…
edited title
Aug
10
comment How to expand and simplify this expression?
For example: rotating 90° and then reflecting has not the same result as reflecting and then rotating 90°.
Aug
10
revised “Constrained” numerical solutions of ODEs with conservation laws?
edited title
Aug
10
revised “Constrained” numerical solutions of ODEs with conservation laws?
added 9 characters in body
Aug
10
asked “Constrained” numerical solutions of ODEs with conservation laws?
Aug
10
comment A set of the plane recursively including “crosses”…
1) No this is not homework and I am not a student. This is an original problem which I invented. 2) Yes you are right, I should have said "non-empty", I'm going to correct.
Aug
10
revised A set of the plane recursively including “crosses”…
added 8 characters in body
Aug
10
asked A set of the plane recursively including “crosses”…
Oct
2
comment Continuous function from $[0,1]$ to $[0,1]$ whose fibers are infinite
It would be interesting to see how the plot of such a function would look like.
Oct
2
awarded  Yearling
Sep
29
comment Prove: If $\lim_{n\to\infty}a_n = L$ and $a_n > a$ for all $n$ then $L \geq a$
Suppose by contradiction that $L<a\leq L+\epsilon \ \forall \epsilon$...
Sep
25
accepted Equal scores in a round-robin tournament implies wins=losses?
Sep
25
comment Equal scores in a round-robin tournament implies wins=losses?
Nice solution! So is $n=8$ actually the minimum $n$ such that the statement is false?
Sep
25
asked Equal scores in a round-robin tournament implies wins=losses?
Aug
26
accepted Deciding whether $2^{\sqrt2}$ is irrational/transcendental
Jul
22
awarded  Commentator
Jul
22
comment Deciding whether $2^{\sqrt2}$ is irrational/transcendental
@J.M.: As far as I understand it the Hilber's problem is to decide wheter it is trascendental, not to decide whether it is irrational.