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- Path: sparky!uunet!dtix!darwin.sura.net!zaphod.mps.ohio-state.edu!menudo.uh.edu!rmverma
- From: rmverma@cs.uh.edu (Dr. R.M. Verma)
- Newsgroups: sci.math
- Subject: Re: Binomial like recurrence
- Message-ID: <1992Aug12.171516.24574@menudo.uh.edu>
- Date: 12 Aug 92 17:15:16 GMT
- References: <1992Aug12.100933.13400@aifh.ed.ac.uk>
- Sender: usenet@menudo.uh.edu (USENET News System)
- Organization: Computer Science dept., Univ. of Houston (Main Campus)
- Lines: 31
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-
- In article <1992Aug12.100933.13400@aifh.ed.ac.uk> tw@aisb.ed.ac.uk (Toby Walsh) writes:
- >
- >The binomial recurrence,
- >
- > c(n,k) = c(n-1,k-1) + c(n-1,k)
- >
- >is well known. Has the related recurrence,
- >
- > u(n,k) = 2.u(n-1,k-1) + u(n-1,k)
- >
- >been studied? Does it have a closed form?
- >What is its asymptotic behaviour?
- >
- >And more generally, how about,
- >
- > v(n,k) = a.v(n-1,k-1) + b.v(n-1,k)
- >
- >for integer a and b?
- >
- >toby
-
- Yes, they have been studied and there are answers to some of your
- questions in the literature.
-
- See the paper by Monier in Journal of ALgorithms 1980, and
- Ch. 8 of The Analysis of Algorithms by Purdom and Brown (more references
- can be found here).
-
- I would like to know your reason for studying them.
-
- R.M. Verma
-