Programmer Guide/Command Reference/EVAL/qdet: Difference between revisions

Revision as of 10:05, 8 April 2011

Compute the pseudo-derminant of the square matrix x.

Usage

qdet(x)

Result: The pseudo-determinant (scalar) of x; Note: In linear algebra and statistics, the pseudo-determinant is the product of all non-zero eigenvalues of a square matrix. It coincides with the regular determinant when the matrix is non-singular.

@@ Line 1: / Line 1: @@
-In linear algebra and statistics, the pseudo-determinant[1] is the product of all non-zero eigenvalues of a square matrix. It coincides with the regular determinant when the matrix is non-singular.
+{{DISPLAYTITLE:abs}}
+Compute the pseudo-derminant of the square matrix ''x''.
+;Usage: '''<code>qdet(<var>x</var>)</code>'''
+:;<var>x</var>: a square matrix
+;Result: The pseudo-determinant (scalar) of ''x''
+:Note: In linear algebra and statistics, the pseudo-determinant is the product of all non-zero eigenvalues of a square matrix. It coincides with the regular determinant when the matrix is non-singular.
+;See also: [[Programmer_Guide/Command_Reference/EVAL/abs|abs]], [[Programmer_Guide/Command_Reference/EVAL/absv|absv]]
-{{DISPLAYTITLE:{{SUBPAGENAME}}}}
+[[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]]
-=====qdet=====
-Computes the quasi-determinant of the square matrix <var>x</var>. <var>x</var> can also be a singular matrix.
-=====Usage:=====
-<code>qdet(<var>x</var>)</code>
-=====Result:=====
-The quasi-determinant of <var>x</var>.
-=====Return Type:=====
-a scalar