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RE: rank question
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From: |
Montgomery-Smith, Stephen |
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Subject: |
RE: rank question |
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Date: |
Sat, 4 Jun 2016 04:48:13 +0000 |
I got this for the first set of row deformations, which is different from yours
in the (4,7) spot.
1 2 3 4 5 6 7
0 -8 -16 -24 -32 -40 -48
0 -8 -16 -24 -32 -40 -48
0 -8 -16 -24 -32 -40 -36
0 -8 -16 -24 -32 -40 -48
________________________________________
From: Help-octave address@hidden on behalf of Tatsuro MATSUOKA address@hidden
Sent: Friday, June 03, 2016 11:39 PM
To: address@hidden; address@hidden
Subject: Re: rank question
Sorry for my confusing post.
I rewrite from the first. Please ignore the first two posts
>> A=[
1,2,3,4,5,6,7
7,6,5,4,3,2,1
9,10,11,12,13,14,15
6,4,2,0,-2,-4,6
10,12,14,16,18,20,22
]
A =
1 2 3 4 5 6 7
7 6 5 4 3 2 1
9 10 11 12 13 14 15
6 4 2 0 -2 -4 6
10 12 14 16 18 20 22
>> rank(A)
ans = 3
The same results are obtained on Scilab and Maxima.
However, row basic deformations of A give to
1 2 3 4 5 6 7
0 -8 -16 -24 -32 -40 -48
0 -8 -16 -24 -32 -40 -48
0 -8 -16 -24 -32 -40 -48
0 -8 -16 -24 -32 -40 -48
1 2 3 4 5 6 7
0 1 2 3 4 5 6
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
Is not the rank of A two (2)?
Am I misled ?
Tatsuro
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