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Any ideas about solving an underdetermined system?

• To: mathgroup at smc.vnet.net
• Subject: [mg58514] Any ideas about solving an underdetermined system?
• From: Zhengji Li <zhengji.li at gmail.com>
• Date: Tue, 5 Jul 2005 04:52:22 -0400 (EDT)
• Reply-to: Zhengji Li <zhengji.li at gmail.com>
• Sender: owner-wri-mathgroup at wolfram.com

Dear Mathematica ers,

Mathematica has a method of given the mininum-length solution.

Let (x1, x2, ...) be a solution, I want that there are as many X-es equal to 0. 

In other words, I want to solving a  underdetermined system in which
many unknowns might be 0. And if I known which ones are 0, then the
system may be simplified to a overdetermined one.

Any ideas?

• Follow-Ups:
  • Re: Any ideas about solving an underdetermined system?
    • From: Sseziwa Mukasa <mukasa@jeol.com>