What is the solution space and subspace of a given matrix?

In summary, a solution space is a set of all possible solutions to a given problem, often represented as a vector space. A subspace is a smaller subset of the solution space that satisfies the same conditions as the larger space. They are related in that a subspace is a more specific version of a solution space and can be used in problem-solving to narrow down potential solutions. Multiple subspaces can exist within a single solution space, representing different sets of conditions that need to be met to find a solution.
  • #1
Aerosion
53
0

Homework Statement



Let A =

[2 -1 9]
[1 0 5]
[0 1 1]

Find solution space W and prove that W is a subspace of R^3.

Homework Equations





The Attempt at a Solution



rref=
[1 0 5]
[0 1 1]
[0 0 0]

So I know the row-echeleon form, which is what I suppose is the solution space. But how do you prove that it's a subspace of R^3? Using the vector space axioms? How do you use those on this kind of matrix?
 
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  • #2
The matrix isn't the solution space. The solution space is the set of vectors x such that Ax=0.
 

What is a solution space?

A solution space is a set of all possible solutions to a given problem. It is often represented as a vector space, where each vector represents a potential solution.

What is a subspace?

A subspace is a subset of a solution space that satisfies the same conditions as the larger solution space. In other words, it is a smaller set of solutions that still meets all of the requirements of the problem.

How are solution spaces and subspaces related?

A subspace is a smaller, more specific version of a solution space. It is a subset of the larger solution space that still meets all of the requirements of the problem. In some cases, a subspace may be a solution space in its own right.

How are solution spaces and subspaces used in problem-solving?

Solution spaces and subspaces are used in problem-solving to help identify potential solutions and narrow down the search for the best solution. By breaking down a problem into smaller subsets, it becomes easier to find a solution that meets all of the necessary conditions.

Can multiple subspaces exist within a single solution space?

Yes, it is possible for multiple subspaces to exist within a single solution space. This can occur when there are different sets of conditions that need to be satisfied in order to find a solution. Each subspace will represent a different set of solutions that meet those specific conditions.

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