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29 lines
850 B
Fortran
29 lines
850 B
Fortran
*DECK CATANH
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COMPLEX FUNCTION CATANH (Z)
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C***BEGIN PROLOGUE CATANH
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C***PURPOSE Compute the arc hyperbolic tangent.
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C***LIBRARY SLATEC (FNLIB)
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C***CATEGORY C4C
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C***TYPE COMPLEX (ATANH-S, DATANH-D, CATANH-C)
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C***KEYWORDS ARC HYPERBOLIC TANGENT, ATANH, ELEMENTARY FUNCTIONS,
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C FNLIB, INVERSE HYPERBOLIC TANGENT
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C***AUTHOR Fullerton, W., (LANL)
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C***DESCRIPTION
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C
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C CATANH(Z) calculates the complex arc hyperbolic tangent of Z.
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C
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C***REFERENCES (NONE)
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C***ROUTINES CALLED CATAN
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C***REVISION HISTORY (YYMMDD)
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C 770401 DATE WRITTEN
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C 861211 REVISION DATE from Version 3.2
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C 891214 Prologue converted to Version 4.0 format. (BAB)
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C***END PROLOGUE CATANH
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COMPLEX Z, CI, CATAN
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SAVE CI
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DATA CI /(0.,1.)/
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C***FIRST EXECUTABLE STATEMENT CATANH
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CATANH = -CI*CATAN(CI*Z)
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C
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RETURN
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END
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