Pell.m
by David Terr
29 Jul 2004
(Updated 04 Aug 2004)
No BSD License
Pell(d,s,n) returns the first n positive integer solution to the modified Pell's equation x^2-dy^2=+
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| Description |
For integers d and s with d nonsquare and positive, Pell(d,s,n) returns the first n positive integer solution (x,y) to the modified Pell's equation x^2-dy^2=(-1)^s, if such a solution exists. Such a solution always exists if s is even, i.e. if the right side is equal to 1, though a solution may not exist if the right side is -1 (s odd), in which case a message is given indicating that this is so. QCF.m is required to run this program. |
| MATLAB release |
MATLAB 6.0 (R12)
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| Comments and Ratings (1) |
| 23 Sep 2008 |
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| Updates |
| 03 Aug 2004 |
I corrected the summary. |
| 04 Aug 2004 |
I added a third argument allowing for multiple solutions. |
| 04 Aug 2004 |
I fixed the documentation. |
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