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Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: to transforme a vector into a matrix
Replies: 6   Last Post: Jul 28, 2006 9:29 AM

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Robert Low

Posts: 1,458
Registered: 12/6/04
Re: to transforme a vector into a matrix
Posted: Jul 28, 2006 8:42 AM
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michele de meo wrote:
> (if i unterstand what you say, sum_{i=1}^n a_i*M_i is a vector and
> not a matrix)

No, M_i is the nxn matrix all of whose entries are 0 except
the (i,i) entry which is 1.

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