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LatticeReduce problem

• To: mathgroup at smc.vnet.net
• Subject: [mg59005] LatticeReduce problem
• From: dto_mba at skynet.be
• Date: Tue, 26 Jul 2005 04:03:16 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

dln[x_, y_] := Module[{lr},
     lr = LatticeReduce[{x, y}];
     Return[Norm[lr]]
     ]
NMinimize[{dln[{x1, x2}, {y1, y2}],
     MatrixRank[{{x1, x2}, {y1, y2}}] ? 2, {x1, x2, y1, y2} \[Element]
      Integers}, {x1, x2, y1, y2}, Method -> NelderMead]

The message I get is : LatticeReduce::latm: 
Matrix contains entry that is not rational.

Apparently x and y have no value when it comes to LatticeReduce.

Who can help me ?

Best,

Theodor Schlickmann

• Follow-Ups:
  • Re: LatticeReduce problem
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>