Jineon Baek
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 Jun12 revised Mathematical (or physical) formulation of life added 269 characters in body Jun12 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! Jun12 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. Jun12 asked Mathematical (or physical) formulation of life Sep20 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? Sep20 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). Sep15 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 Sep11 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 $a_1 = \cdots = a_n = 0$ Sep4 awarded Enthusiast Aug25 accepted Does a 'universal' group/ring/field/topology/etc. exist? Aug25 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. Aug25 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. Aug25 asked Does a 'universal' group/ring/field/topology/etc. exist? Aug23 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! Aug23 accepted A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded Aug22 awarded Nice Question Aug21 awarded Critic Aug21 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! Aug21 asked A separable locally compact metric space is compact iff all of its homeomorphic metric spaces are bounded Aug19 awarded Commentator