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29 lines
813 B
Fortran
29 lines
813 B
Fortran
*DECK CTANH
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COMPLEX FUNCTION CTANH (Z)
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C***BEGIN PROLOGUE CTANH
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C***PURPOSE Compute the complex hyperbolic tangent.
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C***LIBRARY SLATEC (FNLIB)
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C***CATEGORY C4C
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C***TYPE COMPLEX (CTANH-C)
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C***KEYWORDS ELEMENTARY FUNCTIONS, FNLIB, 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 CTANH(Z) calculates the complex hyperbolic tangent of complex
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C argument Z. Z is in units of radians.
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C
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C***REFERENCES (NONE)
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C***ROUTINES CALLED CTAN
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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 CTANH
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COMPLEX Z, CI, CTAN
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SAVE CI
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DATA CI /(0.,1.)/
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C***FIRST EXECUTABLE STATEMENT CTANH
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CTANH = -CI*CTAN(CI*Z)
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C
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RETURN
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END
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