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Subroutine MAP_UTIL_DET

  1. Provenance of code.
  2. Purpose of code.
  3. Specification.
  4. Description of subroutine's operation.
  5. References.
  6. Parameter descriptions.
  7. Error indicators.
  8. Accuracy estimate.
  9. Any additional information.
  10. Example of code
  11. Auxiliary subroutines required.
  12. Keywords.
  13. Download source code.
  14. Links.

Provenance of Source Code

H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.

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Purpose

To calculate the determinant of a 3x3 matrix.

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Specification

Language:FORTRAN
Product form:Source code

SUBROUTINE MAP_UTIL_DET(G, DEL)

REAL G(9), DEL

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Description

MAP_UTIL_DET calculates the determinant of a 3x3 matrix held in vector form.

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References

  1. H.K.D.H. Bhadeshia, Worked Examples in the Geometry of Crystals, Institute of Materials, London, 1987.

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Parameters

Input parameters

G - real array of dimension 9
G is a 3x3 matrix in vector form.

Output parameters

DEL - real
DEL is the determinant of G.

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Error Indicators

None.

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Accuracy

No information supplied.

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Further Comments

None.

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Example

1. Program text

       REAL G(9), DEL
       INTEGER I
       READ (5,*) (G(I), I=1,9)
       CALL MAP_UTIL_DET(G, DEL)
       WRITE (6,*) DEL
       STOP
       END

2. Program data

1.0   -1.0   2.5   -2.0   3.3   1.2   -1.0   4.0   0.5

3. Program results

-14.7

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Auxiliary Routines

None.

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Keywords

determinant

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Download

Download source code

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