Jorge Fernández

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bio website location Mexico City age member for 2 years, 6 months seen 9 mins ago profile views 1,991

Hello, I am a freshman at The National Autonomous University of Mexico (UNAM).

My interests are contest problems,elementary number theory, combinatorics, graph theory, linear algebra, group theory, abstract algebra and I have been meaning to learn category theory and matroids.

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 23m asked Coloring $\mathbb R^n$ with $n$ colors always gives us a color with all distances. 31m revised Combinatorial Geometry Problem added 122 characters in body 34m answered Given a set of integers and operators, find if number is obtainable 55m revised Combinatorial Geometry Problem deleted 274 characters in body 2h answered Combinatorial Geometry Problem 3h comment Combinatorial Geometry Problem An arrangement with more pairs would involve one point being at distance $\sqrt2$ or more from all other points. 3h comment Combinatorial Geometry Problem $12$ is possible, take an equilateral triangle of length 1.5 and for each vertex add 1 point really close to it, you get 12 pairs. 4h comment Combinatorial Geometry Problem So then the answer is $9$? 4h comment Conditionally combining vanilla and chocolate ice scream scoops well, we proved $f(n)=f(n-1)+f(n-2)$ for all $n$, that's the recurrence ficonaccis follow by definition. 4h comment Conditionally combining vanilla and chocolate ice scream scoops Because it has the first initial values and it follows the same recurrence- 4h revised Conditionally combining vanilla and chocolate ice scream scoops edited body 4h comment Conditionally combining vanilla and chocolate ice scream scoops vcv,vvc,cvc,cvv,vvv 5h answered Conditionally combining vanilla and chocolate ice scream scoops 5h answered Four balls with differnt colors in a box, how many times do I need to pick to see all four colors? 6h comment Four balls with differnt colors in a box, how many times do I need to pick to see all four colors? lol, I had assumed that part. 6h comment Four balls with differnt colors in a box, how many times do I need to pick to see all four colors? mathematical boxes are always non-transparent for future reference 7h revised Is it true $f^{-1} (B^C)=(f^{-1}(B))^C$? Is it true $f (B^C)=(f(B))^C$? added 79 characters in body 8h revised Is it true $f^{-1} (B^C)=(f^{-1}(B))^C$? Is it true $f (B^C)=(f(B))^C$? added 79 characters in body 8h answered Is it true $f^{-1} (B^C)=(f^{-1}(B))^C$? Is it true $f (B^C)=(f(B))^C$? 10h comment Question around the following relation: $T(n,1) = n$, for a positive integer $n$, and for all $k\geq 1,\ T(n,k+1)=n^{T(n,k)}$. I did everything again.