fBasics (version 4041.97)

pascal: Pascal matrix

Description

Creates a Pascal matrix.

Usage

pascal(n)

Arguments

n

an integer value, the dimension of the square matrix.

Details

The function pascal generates a Pascal matrix of order n which is a symmetric positive definite matrix with integer entries made up from Pascal's triangle. The determinant of a Pascal matrix is 1. The inverse of a Pascal matrix has integer entries. If lambda is an eigenvalue of a Pascal matrix, then 1/lambda is also an eigenvalue of the matrix. Pascal matrices are ill-conditioned.

References

Call G.S., Velleman D.J., (1993); Pascal's matrices, American Mathematical Monthly 100, 372--376.

Edelman A., Strang G., (2004); Pascal Matrices, American Mathematical Monthly 111, 361--385.

Examples

## Create Pascal Matrix:
P = pascal(5)
P 
   
## Determinant
det(pascal(5)) 
det(pascal(10))   
det(pascal(15))   
det(pascal(20))