History of Matrix

	Revision 19 . . (edit) November 21, 2001 2:52 am by AxelBoldt
	Revision 18 . . November 8, 2001 11:35 pm by AxelBoldt [*link]
	Revision 17 . . November 7, 2001 12:03 pm by Damian Yerrick [note about C language notation; do not use lowercase 'l' (which looks like digit 1) as a variable; copyedit]

---

Difference (from prior major revision) (minor diff)

Changed: 2c2

Matrices are useful to record data that depend on two categories, or to keep track of the coefficients of linear expressions such as linear transformations and [systems of linear equations]?.

Matrices are useful to record data that depend on two categories, or to keep track of the coefficients of linear expressions such as linear transformations and [systems of linear equations]?.

Changed: 41c41

The set M(n, R) of all square n-by-n matrices with real entries, together with matrix addition and matrix multiplication is a ring, in fact a real associative algebra.

The set M(n, R) of all square n-by-n matrices with real entries, together with matrix addition and matrix multiplication is a ring, in fact a real [associative unitary algebra]?.

Changed: 43c43

The unit matrix In, with all elements on the main diagonal set to 1 and all other elements set to 0, gives the identity matrix.

The unit matrix In, with all elements on the main diagonal set to 1 and all other elements set to 0, is the unit element of this ring.

Changed: 58c58

:See also Linear algebra -- Vector space -- Determinants -- Eigenvectors

:See also Linear algebra -- Vector space -- Determinants -- Eigenvectors