From 7ce331c01ce6eb7b3f5c715a38a24359da9c6ee2 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 22 Nov 2001 14:04:29 +0000
Subject: Totally rework the math library, this time based on the MacOs X math
 library (which is itself based on the math lib from FreeBSD).  -Erik

---
 libm/double/revers.c | 156 ---------------------------------------------------
 1 file changed, 156 deletions(-)
 delete mode 100644 libm/double/revers.c

(limited to 'libm/double/revers.c')

diff --git a/libm/double/revers.c b/libm/double/revers.c
deleted file mode 100644
index 370bdb5d6..000000000
--- a/libm/double/revers.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*							revers.c
- *
- *	Reversion of power series
- *
- *
- *
- * SYNOPSIS:
- *
- * extern int MAXPOL;
- * int n;
- * double x[n+1], y[n+1];
- *
- * polini(n);
- * revers( y, x, n );
- *
- *  Note, polini() initializes the polynomial arithmetic subroutines;
- *  see polyn.c.
- *
- *
- * DESCRIPTION:
- *
- * If
- *
- *          inf
- *           -       i
- *  y(x)  =  >   a  x
- *           -    i
- *          i=1
- *
- * then
- *
- *          inf
- *           -       j
- *  x(y)  =  >   A  y    ,
- *           -    j
- *          j=1
- *
- * where
- *                   1
- *         A    =   ---
- *          1        a
- *                    1
- *
- * etc.  The coefficients of x(y) are found by expanding
- *
- *          inf      inf
- *           -        -      i
- *  x(y)  =  >   A    >  a  x
- *           -    j   -   i
- *          j=1      i=1
- *
- *  and setting each coefficient of x , higher than the first,
- *  to zero.
- *
- *
- *
- * RESTRICTIONS:
- *
- *  y[0] must be zero, and y[1] must be nonzero.
- *
- */
-
-/*
-Cephes Math Library Release 2.8:  June, 2000
-Copyright 1984, 1987, 1989, 1992, 2000 by Stephen L. Moshier
-*/
-
-#include <math.h>
-
-extern int MAXPOL; /* initialized by polini() */
-
-#ifdef ANSIPROT
-/* See polyn.c.  */
-void polmov ( double *, int, double * );
-void polclr ( double *, int );
-void poladd ( double *, int, double *, int, double * );
-void polmul ( double *, int, double *, int, double * );
-void * malloc ( long );
-void free ( void * );
-#else
-void polmov(), polclr(), poladd(), polmul();
-void * malloc();
-void free ();
-#endif
-
-void revers( y, x, n)
-double y[], x[];
-int n;
-{
-double *yn, *yp, *ysum;
-int j;
-
-if( y[1] == 0.0 )
-	mtherr( "revers", DOMAIN );
-/*	printf( "revers: y[1] = 0\n" );*/
-j = (MAXPOL + 1) * sizeof(double);
-yn = (double *)malloc(j);
-yp = (double *)malloc(j);
-ysum = (double *)malloc(j);
-
-polmov( y, n, yn );
-polclr( ysum, n );
-x[0] = 0.0;
-x[1] = 1.0/y[1];
-for( j=2; j<=n; j++ )
-	{
-/* A_(j-1) times the expansion of y^(j-1)  */
-	polmul( &x[j-1], 0, yn, n, yp );
-/* The expansion of the sum of A_k y^k up to k=j-1 */
-	poladd( yp, n, ysum, n, ysum );
-/* The expansion of y^j */
-	polmul( yn, n, y, n, yn );
-/* The coefficient A_j to make the sum up to k=j equal to zero */
-	x[j] = -ysum[j]/yn[j];
-	}
-free(yn);
-free(yp);
-free(ysum);
-}
-
-
-#if 0
-/* Demonstration program
- */
-#define N 10
-double y[N], x[N];
-double fac();
-
-main()
-{
-double a, odd;
-int i;
-
-polini( N-1 );
-a = 1.0;
-y[0] = 0.0;
-odd = 1.0;
-for( i=1; i<N; i++ )
-	{
-/* sin(x) */
-/*
-	if( i & 1 )
-		{
-		y[i] = odd/fac(i);
-		odd = -odd;
-		}
-	else
-		y[i] = 0.0;
-*/
-	y[i] = 1.0/fac(i);
-	}
-revers( y, x, N-1 );
-for( i=0; i<N; i++ )
-	printf( "%2d %.10e %.10e\n", i, x[i], y[i] );
-}
-#endif
-- 
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