


SISNAN(3f)    LAPACK auxiliary routine (version 3.1)   SISNAN(3f)


NAME
       SISNAN - .TRUE

SYNOPSIS
       LOGICAL FUNCTION SISNAN(SIN)

           REAL         SIN

PURPOSE
       SISNAN  returns  .TRUE. if its argument is NaN, and .FALSE.  otherwise.
       To be replaced by the Fortran 2003 intrinsic in the future.


ARGUMENTS
       SIN      (input) REAL
                Input to test for NaN.









































 LAPACK auxiliary routine November 2006                         1


