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visits member for 3 years, 1 month
seen Aug 17 at 18:46

Jun
12
comment Mathematical (or physical) formulation of life
@SimonMarkett Yes, I heard of it before. I think the game of life partially answers the question. It has simple rules and various patterns emerging from the rules, some even reproducing another patterns!
Jun
12
comment Mathematical (or physical) formulation of life
Should I delete this question or change this to a community wiki? I'm new to this site so any corrections are welcome.
Jun
12
asked Mathematical (or physical) formulation of life
Sep
20
comment Project Euler Problem 338
Sorry if it's not much related to the question. But I'm curious if we could prove that dividing into two staircases is the only way of forming another rectangle. How can we do this?
Sep
20
comment What is the smallest number of $45^\circ-60^\circ-75^\circ$ triangles that a square can be divided into?
@Peter I think 45-60-75 means that the triangle has 45, 60, 75 as its angles (in degree).
Sep
15
comment What is the smallest number of $45^\circ-60^\circ-75^\circ$ triangles that a square can be divided into?
@Ed Pegg How did Laczkovich packed the square with triangles? I'm very curious :D
Sep
11
comment Integer solutions to $(a_1+a_2+\cdots+a_n)^n=a_1a_2\cdots a_n$?
$(a_1+...+a_n)^n \geq (a_1)(a_2)\cdots(a_n)=a_1\cdot \cdots \cdot a_n $ The equality only holds iff $a_1 = \cdots = a_n = 0$
Sep
4
awarded  Enthusiast
Aug
25
accepted Does a 'universal' group/ring/field/topology/etc. exist?
Aug
25
comment Does a 'universal' group/ring/field/topology/etc. exist?
@Miha Yes. If anything makes you incomprehensible feel free to modify my question to make it easier to understand.
Aug
25
comment Does a 'universal' group/ring/field/topology/etc. exist?
@Ilmari Karonen Thanks for grammar correction! I'm still a novice in English so it helps me a lot.
Aug
25
asked Does a 'universal' group/ring/field/topology/etc. exist?
Aug
23
comment A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded
Thanks for all who considered my question!
Aug
23
accepted A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded
Aug
22
awarded  Nice Question
Aug
21
awarded  Critic
Aug
21
comment A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded
He and I only took elementary topology, so the claim might become very trivial when one goes into deeper mathematics. If it is so, please tell us which theory can be employed. Thanks!
Aug
21
asked A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded
Aug
19
awarded  Commentator
Aug
19
comment Prove convexity/concavity of a complicated function
Is $f$ the function you wanted to optimize in your previous question? :D Edit: Oh no I didn't realized that $f$ is one-variable here!