I just need the concept so on something simple like 1100 0111 0000 0000 Any help is greatly appreciated*Sorry, for some reason, I can't enter down. Bascially it is a 4x4 matrix while using those numbers

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- Mar 17th 2012, 11:37 AMCollegeGal09Find the Basis of a row
I just need the concept so on something simple like 1100 0111 0000 0000 Any help is greatly appreciated*Sorry, for some reason, I can't enter down. Bascially it is a 4x4 matrix while using those numbers

- Mar 17th 2012, 03:29 PMDevenoRe: Find the Basis of a row
"rows" don't have a basis, row SPACES do. rows are vectors. vector spaces have bases.

in this case, each row can be regarded as an element of R^4. since 0-elements are always linearly dependent, only non-zero rows are eligible for membership in a basis. you have 2 non-zero row vectors:

(1,1,0,0) and (0,1,1,1).

to prove this is a basis for the row space, you need to show linear independence.

so suppose a(1,1,0,0) + b(0,1,1,1) = (0,0,0,0). this is the same as saying:

(a,a+b,b,b) = (0,0,0,0)

can you prove that we HAVE to have a = 0, and b = 0 (hint: look at the first two coordinates of the vectors on each side of the equality).