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1.1     ! root        1: .TI F77/IMSL_LIB "Sep. 4, 1985"
        !             2: IMSL Library of Mathematical and Statistical Procedures
        !             3: 
        !             4: The IMSL library, which includes over 500 Fortran callable subroutines,
        !             5: is available for VAX UNIX.  There are both single and double precision
        !             6: versions; check with your system administrator to see if your system
        !             7: has the IMSL library and how to access it.  The rest of this write-up
        !             8: assumes you have the double precision version, and it is
        !             9: accessed as '-limsld'.
        !            10: 
        !            11: While IMSL includes mainly mathematical and statistical routines,
        !            12: chapter U of the library includes utility routines for printing histograms,
        !            13: for plotting functions, and for printing arrays.  To use the double
        !            14: precision version, specify '-limsld' to f77:
        !            15: 
        !            16:        f77 prog.f -limsld
        !            17: 
        !            18: The IMSL manual includes an introduction, table of contents and
        !            19: permuted index at the beginning of volume 1.  New users of IMSL should
        !            20: read sections 5.2 through 5.6.1 (about 5 pages) of the introduction
        !            21: before using the library.  If IMSL does not contain an appropriate
        !            22: subroutine for what you are doing, see "help f77 libraries" for information
        !            23: on other libraries.
        !            24: 
        !            25: Most of the library is written using double precision variables.  To
        !            26: see if a specific routine expects single or double precision arguments,
        !            27: look in the manual for the 'PRECISION/HARDWARE' information.  If it
        !            28: specifies 'DOUBLE/H32' or 'SINGLE AND DOUBLE/H32' then floating point
        !            29: arguments must be double precision, if it specifies 'SINGLE/H32' or
        !            30: \&'SINGLE/ALL' then floating point arguments must be single precision.
        !            31: 
        !            32: The manual is written as if all the subroutines expect single precision
        !            33: arguments.  Generally, for the double precision version of the library,
        !            34: you will have to supply double precision arguments.  If you have
        !            35: written your program in single precision, see "help f77 to_double" to
        !            36: see what changes are needed to use double precision.
        !            37: 
        !            38: There are five common errors in using IMSL routines:
        !            39: .IP "1."
        !            40: Using single precision when double precision is required.
        !            41: .IP "2."
        !            42: Not checking the error flag.
        !            43: Most routines have an error flag that
        !            44: IMSL sets to an error value when something goes wrong; it is your
        !            45: responsibility to check it.
        !            46: .IP "3."
        !            47: Omitting arguments.  IMSL routines often have many
        !            48: arguments that are required even if you don't use the result.
        !            49: .IP "4."
        !            50: Not dimensioning arguments.  Especially make sure work areas are
        !            51: appropriately dimensioned.
        !            52: .IP "5."
        !            53: Supplying incorrect 'row dimension' of matrices.  Many IMSL routines
        !            54: have a calling sequence of the form:
        !            55: 
        !            56:        call sub( a, nr, nc, ia, ... )
        !            57: 
        !            58: where 'a' is a matrix, 'nr' is it's row order, 'nc' is it's column order,
        !            59: and 'ia' is it's row dimension.  The orders 'nr' and 'nc' are the number
        !            60: of rows and columns being used, while 'ia' is the row dimension of the
        !            61: matrix exactly as specified in the dimension statement in the calling
        !            62: program.  The row order and row dimension are often different and must
        !            63: be specified correctly.

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