grid_tools  1.4.0
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psym2::logsym2 Interface Reference

Private Member Functions

subroutine logsym2 (em, logem)
 Get the log of a symmetric positive-definite 2*2 matrix. More...
 
subroutine logsym2d (x, z, zd)
 General routine to evaluate the logarithm, z=log(x), and the symmetric derivative, zd = dz/dx, where x is a symmetric 2*2 positive-definite matrix. More...
 

Detailed Description

Definition at line 29 of file psym2.f90.

Constructor & Destructor Documentation

subroutine psym2::logsym2::logsym2 ( real(dp), dimension(2,2), intent(in)  em,
real(dp), dimension(2,2), intent(out)  logem 
)
private

Get the log of a symmetric positive-definite 2*2 matrix.

Parameters
[in]emsymmetric 2*2 matrix
[out]logemlog of a symmetric positive-definite 2*2 matrix
Author
R. J. Purser

Definition at line 386 of file psym2.f90.

Member Function/Subroutine Documentation

subroutine psym2::logsym2::logsym2d ( real(dp), dimension(2,2), intent(in)  x,
real(dp), dimension(2,2), intent(out)  z,
real(dp), dimension(2,2,2,2), intent(out)  zd 
)
private

General routine to evaluate the logarithm, z=log(x), and the symmetric derivative, zd = dz/dx, where x is a symmetric 2*2 positive-definite matrix.

Parameters
[in]zdthe symmetric derivative
[out]xa symmetric 2*2 positive-definite matrix
[out]zevaluate the logarithm log(x)
Author
R. J. Purser

Definition at line 408 of file psym2.f90.


The documentation for this interface was generated from the following file: