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Manual Reference Pages  - invert_2x2 (3)

NAME
invert_2x2(3f) - [M_math] directly invert 2x2 matrix

CONTENTS

Synopsis
Description
Options
Example

SYNOPSIS
pure function invert_2x2(A) result(B) 

   ! integer,real,double,complex


   integer,parameter         :: wp=kind(0|0.0|0.0d|(0.0,0.0))
   NNNNNN(kind=wp), intent(in) :: A(2,2)   !! Matrix
   NNNNNN(kind=wp)             :: B(2,2)   !! Inverse matrix
    where
   NNNNNN may be INTEGER,REAL,DOUBLEPRECISION,COMPLEX

DESCRIPTION

Directly invert 2x2 matrix for speed (versus using, e.g. LAPACK)

OPTIONS

A original 2x2 matrix, may be INTEGER, REAL, DOUBLE, or COMPLEX
B inverted 2x2 matrix, of same type as input matrix A

EXAMPLE

invert_2x2 (3) October 17, 2020
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