- #1
chaoseverlasting
- 1,050
- 3
Hi,
While solving a system of linear equations, there are three possible cases - unique / infinite / no solutions - to the system.
One geometric interpretation is when one looks at a set of planes intersecting at one / many / no points respectively, for each of the above cases.
While going through what constitutes a vector space & how to check if a set of vectors belongs to a vector space (Sec. 7.4, q 27-36, p.302, Erwin Kreyzsig 9th Ed.), it seemed to me that the tests are similar to the Gauss Elimination method of checking for a single / many / no solutions via the rank of the augmented / coefficient matrices.
Is it possible to interpret the solutions (one, many, none) to a system of linear equations in terms of vector spaces?
I.e. if there is only one solution, the ranks of the augmented & coefficient matrices are equal - this means that we have identified a fundamental vector space for that system of equations.
If there are multiple solutions (infinitely many) to the system, then there is a more fundamental vector space for that system of equations and the augmented matrix / coeffiecient matrix vector space is a super set of that fundamental vector space - thus leading to infinitely many solutions.
For the no solution case, the vector spaces are dissimilar and unrelated, thus no solutions exist.
Apologies if the explanations are unclear - I'm still trying to understand the material better.
TIA for any insights / inputs.
While solving a system of linear equations, there are three possible cases - unique / infinite / no solutions - to the system.
One geometric interpretation is when one looks at a set of planes intersecting at one / many / no points respectively, for each of the above cases.
While going through what constitutes a vector space & how to check if a set of vectors belongs to a vector space (Sec. 7.4, q 27-36, p.302, Erwin Kreyzsig 9th Ed.), it seemed to me that the tests are similar to the Gauss Elimination method of checking for a single / many / no solutions via the rank of the augmented / coefficient matrices.
Is it possible to interpret the solutions (one, many, none) to a system of linear equations in terms of vector spaces?
I.e. if there is only one solution, the ranks of the augmented & coefficient matrices are equal - this means that we have identified a fundamental vector space for that system of equations.
If there are multiple solutions (infinitely many) to the system, then there is a more fundamental vector space for that system of equations and the augmented matrix / coeffiecient matrix vector space is a super set of that fundamental vector space - thus leading to infinitely many solutions.
For the no solution case, the vector spaces are dissimilar and unrelated, thus no solutions exist.
Apologies if the explanations are unclear - I'm still trying to understand the material better.
TIA for any insights / inputs.