- #1

jeffreylze

- 44

- 0

## Homework Statement

After sorting out basis, now I encountered a new term, Subset. And I get all confused again, clearly I'm not good at these, but I am learning.

Let S = {(1,-1,2,1) , (0,1,1,-2) , (1,-3,0,5)}

Find a subset of S that is a basis for <S>

## Homework Equations

## The Attempt at a Solution

I formed a matrix and row reduced it to row echelon form. Then the corresponding columns on the leading entry gives the basis which is {(1,-1,2,1) ,(0,1,1,-2)} . But now, to answer the question, how to find a subset ? and also, what does <S> mean ? Is that a symbol for a basis?