Study notes
Sets & Matrices
Set notation and Venn-diagram counting, plus matrix addition, scalar multiplication, and the matrix product.
What this topic covers
- A set is a well-defined collection, written with notation
- Union combines, intersection overlaps
- The complement is everything outside the set
- The addition rule counts a union without double-counting the overlap
- A matrix is a rectangular array; only matrices of the SAME order can be added or subtracted
- The matrix product is row-by-column, not entry-by-entry
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