In linear algebra, a column vector with m {\displaystyle m} elements is an m × 1 {\displaystyle m\times 1} matrix consisting of a single column of m {\displaystyle m} entries. Similarly, a row vector is a 1 × n {\displaystyle 1\times n} matrix, consisting of a single row of n {\displaystyle n} entries.
In linear algebra, a column vector with m {\displaystyle m} elements is an m × 1 {\displaystyle m\times 1} matrix consisting of a single column of m {\displaystyle m} entries. Similarly, a row vector is a 1 × n {\displaystyle 1\times n} matrix, consisting of a single row of n {\displaystyle n} entries.
Source: Wikipedia "Row and column vectors" · CC BY-SA 4.0
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