Mohammad Descartes


Posts : 100 Join date : 2009-11-05 Age : 35 Location : Right behind you
 | Subject: [SOLVED] Combinatorics Fri Nov 06, 2009 6:15 pm | |
| let's start warming up with a problem in combinatorics  you can find the question (level: undergraduate) in the following link uploading.com Combinatorics.pdf/I'll post the solution next week. At the moment no prize, I should evaluate you at first then you will see how much I am generous  .
Last edited by Mohammad on Sat Nov 07, 2009 7:21 pm; edited 3 times in total |
|
Bruno Admin

Posts : 184 Join date : 2009-09-15 Age : 31 Location : the infinite, frictionless plane of uniform density
 | Subject: Re: [SOLVED] Combinatorics Fri Nov 06, 2009 7:40 pm | |
| Hey Mohammad! The link doesn't work  You have to link directly to the PDF file! |
|
Bruno Admin

Posts : 184 Join date : 2009-09-15 Age : 31 Location : the infinite, frictionless plane of uniform density
 | Subject: Re: [SOLVED] Combinatorics Sat Nov 07, 2009 3:25 pm | |
| Hello Mohammad Now the link works. And here is my solution! If you have a combinatorial proof I'd love to see it. I tried going down that path at first but it did not seem like the best plan. |
|
Mohammad Descartes


Posts : 100 Join date : 2009-11-05 Age : 35 Location : Right behind you
 | Subject: sol Sat Nov 07, 2009 6:16 pm | |
| Well done, your proof is the same I had in my mind.  Now I should be careful who I am talking to  |
|
Bruno Admin

Posts : 184 Join date : 2009-09-15 Age : 31 Location : the infinite, frictionless plane of uniform density
 | Subject: Re: [SOLVED] Combinatorics Sat Nov 07, 2009 6:41 pm | |
| Thanks! I don't know if there is another good way to do it. This seems like the only straightforward solution. It's funny because last night I was trying all sorts of stupid things for about thirty minutes (even induction!  ) , then I got discouraged and I went to take a nap before going to a party. I woke up thirty minutes later and my first thought was "Chebyshev inequality", and I was so certain it would work that I didn't even check until this morning!  |
|
Sponsored content
 | Subject: Re: [SOLVED] Combinatorics  | |
| |
|