ULU

Purpose:

Computes an upper triangular table in LU decomposition.

Syntax:

ULU(a)

a

-

A square matrix.

Returns:

A matrix.

Example:

x = {{1, 2, 3},

     {4, 5, 6}, 

     {7, 8, 10}} 

 

ulu(x) = {{7.000, 8.000, 10.000},

          {0.000, 0.8571, 1.571},

          {0.000, 0.000, -0.5}}

Remarks:

For the LU decomposition of a square matrix A:

 

A = llu(A) *^ ulu(A)

 

also:

 

A = lu(A, 0, 1) *^ lu(A, 1, 1)

 

See LU for a further discussion of LU decomposition.

See Also:

LLU

LU

MMULT