What is a Matrix? (VCE SSCE General Mathematics): Flashcards

Rectangular arrangement of numbers in rows and columns

Rows $\times$ columns (rows first, then columns)

Matrix with only one row

Matrix with only one column

Matrix with equal number of rows and columns

Square matrix with zeros off the leading diagonal

Symbol $I$; ones on diagonal, zeros elsewhere

Square matrix unchanged when transposed

Switching rows and columns (denoted $A^T$)

Element in row $i$, column $j$ of matrix $A$