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  • 0 posts edited
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2d
comment three grasshoppers jumping on a plane.
what does $g_2 - g_1$ stands for? Is this an attempt to write coordinates of grasshopper1 jumped over grasshopper2?
2d
asked three grasshoppers jumping on a plane.
May
19
comment Random walk on natural number
thank you. I actually was looking for a good introduction to generating functions, so I hope that your suggestion will help me.
May
19
awarded  Benefactor
May
19
comment Random walk on natural number
thank you for another approach. It is sad, that my current mathematical knowledge is not enough to understand it :-(
May
19
accepted Random walk on natural number
May
19
awarded  Nice Question
May
15
comment Random walk on natural number
thank you for the explanation. One thing I find strange in it, is that the expected number of steps is undefined if the probability of stepping right and left are the same ($p=0.5$). On the other hand, this is the only case that I was able to find and my answer is that it should be $n^2$
May
15
comment Random walk on natural number
thank you for a detailed answer. One thing I find strange in it, is that the expected number of steps is undefined if the probability of stepping right and left are the same ($p=0.5$). On the other hand, this is the only case that I was able to find and my answer is that it should be $n^2$.
May
14
awarded  Promoter
May
14
revised Random walk on natural number
added 168 characters in body
May
11
comment Random walk on natural number
@M.Wind Tried to update it. If you see any place where it looks like you can go to any negative number, please feel free to update it.
May
11
revised Random walk on natural number
added 18 characters in body
May
11
comment Random walk on natural number
@M.Wind I explained that from point $0$ you go to $1$ with 100% probability, so basically there is no way to end up on a negative number.
May
11
revised Random walk on natural number
added 178 characters in body
May
11
asked Random walk on natural number
May
9
comment what are the benefits of a factorial number system?
@nickalh is it possible to explain how can I find prime numbers with factorial number system?
May
8
comment what are the benefits of a factorial number system?
@SimonS I agree with you. You can not add/subtract/multiply/divide easily. The only real advantage is to find n-th ordered permutations. But I hope that some of smart mathematicians would be able to show me some cool applications.
May
8
asked what are the benefits of a factorial number system?
Apr
25
comment Intuitive explanation why if $P$ is a subspace of linear space $L$, then $L/P$ is not a subspace of $L$
and why exactly these horizontal lines are not a subspace of L?