# Matrix

- The body constituent of a composite or two-phase alloy that completely surrounds the dispersed phase and gives the body its bulk form.

## Mathematics

- A rectangular array of elements. The dimensions of a matrix are often written as
*m x n*. Where*m*is the number of rows and*n*the number of columns. *Examples*- 2 x 2 matrix, also known as a square matrix
- 2 x 3 matrix
- 4 x 2 matrix

- If we have a matrix
- each element of the matrix may be referenced using the notation
**A**_{i,j} - i is the row and j is the column
- Then
**A**_{1,1}= 3,**A**_{2,3}= 1,**A**_{3,4}= 56

## Materials

**See also: **Alloy, Characteristic Polynomial of a Matrix, Column Space of a Matrix, Defective Matrix, Diagonal Matrix, Eigenvector of a Matrix, Elementary Matrix, Hankel Matrix, Inverse of a Matrix, Invertible Matrix, Jordan Matrix, Main Diagonal, Nonsingular Matrix, Null Space of a Matrix, Nullity of a Matrix, Orthogonal Matrix, Row Equivalent Matrices, Row Space of a Matrix, Singular Matrix, Symmetric Matrix, Toeplitz Matrix, Trace, Unimodular Matrix, Unitary Matrix.

**Subjects: ** Mathematics

- Matrices: Theory and Applications (Graduate Texts in Mathematics), , Springer-Verlag Berlin and Heidelberg GmbH & Co. KG

**Further reading:**