950 reputation
21426
bio website lagmental.com
location Mexico
age 25
visits member for 4 years
seen Sep 24 at 2:48

Mathematics and computer science student.


Sep
16
awarded  Yearling
Jul
2
awarded  Curious
May
3
awarded  Favorite Question
Apr
22
comment is there a method for generating functions to construct recurrence relations?
All of them are about getting a closed form for the terms, I want to get recurrences for my sequences.
Apr
21
asked is there a method for generating functions to construct recurrence relations?
Feb
19
awarded  Good Answer
Feb
14
comment How many positive integers $< 1{,}000{,}000$ contain the digit $2$?
@WinMc yeah, I take part in codeforces and topcoder that's why I'm trying to improve my dynamic programming skills with problems like this so I'm looking where can I learn.
Feb
14
comment How many positive integers $< 1{,}000{,}000$ contain the digit $2$?
can you give me one reference where I can learn this kind of things? (counting+recurrences)
Feb
4
awarded  Notable Question
Jan
11
accepted Looking for counterexample in graph theory
Jan
11
comment Looking for counterexample in graph theory
thanks, the first one was the bolder one :)
Jan
11
asked Looking for counterexample in graph theory
Jan
10
awarded  Favorite Question
Dec
17
awarded  Organizer
Dec
17
revised Why does the exponential generating function approach fail here?
added 'generating-functions' tag
Dec
17
suggested suggested edit on Why does the exponential generating function approach fail here?
Nov
9
awarded  Popular Question
Oct
24
answered Is there any simple method to calculate $\sqrt x$ without using logarithm
Oct
23
comment Why do we write complex numbers as $e^{i \theta} $?
we don't write it like that because $e$ is special, $e$ is special because of that :D
Oct
22
answered Why do we write complex numbers as $e^{i \theta} $?