Matrix
Concept history
A revision trail for this concept page.
Revision 3202
8/31/2026, 6:18:27 PM · Sequoia
Shared settings updated from fr translation
domainGeneral algebraLinear algebra
Revision 791
8/1/2026, 3:27:34 PM · Ancient Tree
Concept edited
This older revision predates detailed metadata tracking.
Revision 789
8/1/2026, 3:20:02 PM · Ancient Tree
Concept edited
This older revision predates detailed metadata tracking.
Revision 787
8/1/2026, 3:11:56 PM · Ancient Tree
Concept edited
Compare with revision 35511 changed lines
1
##### Intuitive definition 2
A matrix is a rectangular array of numbers arranged in rows and columns, such as2
A matrix is a rectangular array of numbers arranged in rows and columns, such as:3
$$A=\left(\begin{array}{ccc}4
2 & 1 & -1 \\5
1 & 4 & 76
\end{array}\right),\; B=\left(\begin{array}{ll}7
0 & 1 \\8
1 & 09
\end{array}\right)$$3
4
##### Formal definition5
A matrix over a field $k$ is ...12
A $m\times n$ matrix over a field $k$ is a family $A=(a_{ij})_{1\leq i\leq m,1\leq j\leq n}$ of elements of $k$, where $a_{ij}$ is called the $(i,j)$-entry, or coefficient, of $A$.Revision 355
7/8/2026, 2:21:52 PM · Ancient Tree
Concept edited
Compare with revision 2616 changed lines
1
A matrix is...1
##### Intuitive definition 2
A matrix is a rectangular array of numbers arranged in rows and columns, such as3
4
##### Formal definition5
A matrix over a field $k$ is ...Revision 261
7/7/2026, 10:38:57 AM · Ancient Tree
Concept created
A matrix is...