dREaM
Reputation
38,744
97/100 score
 Jan 12 comment How to find a planar graph if I know that it has 7 faces with certain sizes? sorry, that was not a very good question. Jan 12 comment How to find a planar graph if I know that it has 7 faces with certain sizes? Can we have vertices of degree $2$? Jan 12 comment How to find a planar graph if I know that it has 7 faces with certain sizes? Hint: draw stuff Jan 12 comment Permutations of variable size using the letters of a word Oh, I do not count the "empty word" as a word by the way. Jan 12 answered Permutations of variable size using the letters of a word Jan 12 comment Permutations of variable size using the letters of a word Yeah, I hadn't read that you wanted variable lengths at first. that makes it more interesting. Of course we can just iterate over all possible combinations of multiplicity for each letter and use multinomial coefficients Jan 12 comment Permutations of variable size using the letters of a word If I had a nickel for every time this question has been asked !! Jan 12 answered Nested absolute-value inequality Jan 12 comment Number of ways of selling 5 products for 4 customers Did you try 30% OFF ? Jan 10 comment Points of a root in a rooted, connected graph what is $C_k$ and $G_{p-k}$? Jan 9 answered To prove there is only a finite number of subgroups in G Jan 8 comment Does lim$_{a \rightarrow b } \space d(a,b) = 0$ imply completeness in a metric space? oh ok, thank you very much for your help! Jan 8 comment Does lim$_{a \rightarrow b } \space d(a,b) = 0$ imply completeness in a metric space? So to make the story short, the question makes no sense right? It is equivalent to asking: is every metric space complete? Jan 8 comment Does lim$_{a \rightarrow b } \space d(a,b) = 0$ imply completeness in a metric space? Oh good to know, I was confused by OP. Jan 8 answered Prove: $\forall$ $n\in \mathbb N, (2^n)!$ is divisible by $2^{(2^n)-1}$ and is not divisible by $2^{2^n}$ Jan 8 answered How can this function possibly ever be greater than another? Jan 7 comment Group of order 63 it is a group of order $p^2q$ Jan 7 answered Number of binary operations on a set Jan 6 comment Find what row a given number exists in within a binary heap tree. Sure, I added a c++ function that finds the floor, just be careful your number is an int under 2^62 Jan 6 revised Find what row a given number exists in within a binary heap tree. added 149 characters in body