Question

How Span({(1,1,1,1).(1,1,1,0) }) = Span ({(1,0,0,0),(0,1,0,0)}
Please explain me.

Answer 1

@amistre64

Answer 2

the two matrices are row equivalent

Answer 3

nope, not that,

Answer 4

?? what do you mean not that?

Answer 5

rref of the first one is (1,1,1,0 ) and second row is (0,0,0,1) they are not e1,e2

Answer 6

wait, are talking about 2x4 matrix?

Answer 7

or 4x2?

Answer 8

whatsoever, if the first one 2,4 then the second one is the same.

Answer 9

you see, page 24 http://www.math.ucla.edu/~yanovsky/handbooks/linear_algebra.pdf

Answer 10

I don't understand the very first line, :(((

Answer 11

how can I step up, right?

Answer 12

oh, nvm , I got it. I am sorry.