       Limits of FindIntegerNullVector[]?

• To: mathgroup at smc.vnet.net
• Subject: [mg121036] Limits of FindIntegerNullVector[]?
• From: Greg Childers <gchilders at Exchange.FULLERTON.EDU>
• Date: Wed, 24 Aug 2011 03:15:07 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

```Hi,

I'm having trouble solving an integer relations problem.  The help
document indicates that FindIntegerNullVector[] should work, but I'm not
having success.  Here's the basis set I'm using:

A = Fibonacci;
u = Fibonacci;
v = Fibonacci;
basis = Join[{A}, Table[u^(6 - i) v^i, {i, 0, 6}]];

There's a known simple solution.

soln = {-1, 1, 0, 15, 20, 30, 18, 5};

In:= soln.basis
Out= 0

And the norm doesn't appear too large.

In:= Sqrt[soln.soln] // N
Out= 43.3128

But I'm not having any success with FindIntegerNullVector[].  Both of
the statements below fail to find the solution.

FindIntegerNullVector[basis]
FindIntegerNullVector[basis, 50]

Any suggestions?

Thanks,
Greg

--
Greg Childers
Associate Professor
Dept. of Physics
California State U. Fullerton
800 N. State College Blvd.
Fullerton, CA  92834
(657) 278-2159
(657) 278-1458 (fax)

```

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