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Re: Direct product of two matrices

• To: mathgroup at smc.vnet.net
• Subject: [mg27766] Re: [mg27721] Direct product of two matrices
• From: Tomas Garza <tgarza01 at prodigy.net.mx>
• Date: Wed, 14 Mar 2001 04:07:09 -0500 (EST)
• References: <200103130852.DAA26215@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

I'm not clear as to what you mean by "direct" product. Ordinary
multiplication of matrices A, B is handled by "Dot": A.B or Dot[A, B]. If
you take A*B you will get a term-by-term product, which would be meaningless
in matrix theory. An ample discussion about products is found in The Book or
in the on-line Help Browser.

Tomas Garza
Mexico City
----- Original Message -----
From: "chinfo" <chinfo at sina.sharif.ac.ir>
To: mathgroup at smc.vnet.net
Subject: [mg27766] [mg27721] Direct product of two matrices


> Dear friends,
> How can I calculate direct product of two matrices?
>
> Best regards,
> Khanlari
> E-mail : alikhus at yahoo.com
>

• References:
  • Direct product of two matrices
    • From: "chinfo" <chinfo@sina.sharif.ac.ir>