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Re: Add terms surrounded by zero together in matrix

• To: mathgroup at smc.vnet.net
• Subject: [mg59130] Re: Add terms surrounded by zero together in matrix
• From: Oliver Friedrich <oliver.friedrich at tzm.de>
• Date: Sat, 30 Jul 2005 01:25:03 -0400 (EDT)
• References: <dcccur$3j7$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

"mchangun at gmail.com" <mchangun at gmail.com> wrote in news:dcccur$3j7$1
@smc.vnet.net:

> Hi All,
> 
> I think this is a rather tough problem to solve.  I'm stumped and would
> really appreciated it if someone can come up with a solution.
> 
> What i want to do is this.  Suppose i have the following matrix:
> 
> 0       0       0       1       0
> 0       0       1       2       0
> 0       0       0       2       1
> 1       3       0       0       0
> 0       0       0       0       0
Hallo,
assume

000000
000100
001000
000000

Are these two 1s considered to be a set with sum 2 or two sets each with 
sum 1?.
In other words: Must exist a vertical or horizontal path that connects two 
elements or can there be a diagonal path?

Oli