Finding a Spanning Set for 3x3 Symmetric Matrices?

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SUMMARY

The discussion focuses on finding a spanning set for the space of all 3x3 symmetric matrices. The user proposes a set of matrices as potential candidates for the spanning set, indicating that the elements of the set are indeed matrices. The user also draws a parallel between matrix operations and vector operations, confirming that addition and scalar multiplication are defined similarly for both. The proposed matrices include specific arrangements of ones and zeros, which are essential for forming a basis in this context.

PREREQUISITES
  • Understanding of 3x3 symmetric matrices
  • Knowledge of linear algebra concepts, specifically spanning sets
  • Familiarity with matrix operations such as addition and scalar multiplication
  • Basic proficiency in matrix representation and notation
NEXT STEPS
  • Study the properties of symmetric matrices in linear algebra
  • Learn how to construct a basis for vector spaces, specifically for matrices
  • Explore the concept of linear independence in the context of matrices
  • Investigate the application of spanning sets in higher-dimensional spaces
USEFUL FOR

Students and educators in linear algebra, mathematicians exploring matrix theory, and anyone interested in understanding the structure of symmetric matrices and their spanning sets.

paulrb
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Homework Statement


Find a spanning set for the space of all 3x3 symmetric matrices.


Homework Equations





The Attempt at a Solution


I know how to find the spanning set for vectors, but I don't know if it works the same way for matrices. Is the set's elements matrices? If so, would this be it?

|100| |010| |001| |000| |000| |000|
|000| |100| |000| |010| |001| |000|
|000| |000| |100| |000| |010| |001|

Sorry if that's messy, I'm not sure what the normal way of typing matrices is.
 
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Notice that addition and scalar multiplication for vectors and matrices are defined the same way.

Notice also that the matrix | 1 4 |
| 3 7 |
(an array of numbers, a "list")
can be represented as <1 ,4, 3, 7> (a list) which is a vector.
 

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