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diff --git a/libm/double/planck.c b/libm/double/planck.c
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-/*							planck.c
- *
- *	Integral of Planck's black body radiation formula
- *
- *
- *
- * SYNOPSIS:
- *
- * double lambda, T, y, plancki();
- *
- * y = plancki( lambda, T );
- *
- *
- *
- * DESCRIPTION:
- *
- *  Evaluates the definite integral, from wavelength 0 to lambda,
- *  of Planck's radiation formula
- *                      -5
- *            c1  lambda
- *     E =  ------------------
- *            c2/(lambda T)
- *           e             - 1
- *
- * Physical constants c1 = 3.7417749e-16 and c2 = 0.01438769 are built in
- * to the function program.  They are scaled to provide a result
- * in watts per square meter.  Argument T represents temperature in degrees
- * Kelvin; lambda is wavelength in meters.
- *
- * The integral is expressed in closed form, in terms of polylogarithms
- * (see polylog.c).
- *
- * The total area under the curve is
- *      (-1/8) (42 zeta(4) - 12 pi^2 zeta(2) + pi^4 ) c1 (T/c2)^4
- *       = (pi^4 / 15)  c1 (T/c2)^4
- *       =  5.6705032e-8 T^4
- * where sigma = 5.6705032e-8 W m^2 K^-4 is the Stefan-Boltzmann constant.
- *
- *
- * ACCURACY:
- *
- * The left tail of the function experiences some relative error
- * amplification in computing the dominant term exp(-c2/(lambda T)).
- * For the right-hand tail see planckc, below.
- *
- *                      Relative error.
- *   The domain refers to lambda T / c2.
- * arithmetic   domain     # trials      peak         rms
- *    IEEE      0.1, 10      50000      7.1e-15     5.4e-16
- *
- */
-
-
-/*
-Cephes Math Library Release 2.8:  July, 1999
-Copyright 1999 by Stephen L. Moshier
-*/
-
-#include <math.h>
-#ifdef ANSIPROT
-extern double polylog (int, double);
-extern double exp (double);
-extern double log1p (double); /* log(1+x) */
-extern double expm1 (double); /* exp(x) - 1 */
-double planckc(double, double);
-double plancki(double, double);
-#else
-double polylog(), exp(), log1p(), expm1();
-double planckc(), plancki();
-#endif
-
-/*  NIST value (1999): 2 pi h c^2 = 3.741 7749(22) ЃЧ 10-16 W m2  */
-double planck_c1 = 3.7417749e-16;
-/*  NIST value (1999):  h c / k  = 0.014 387 69 m K */
-double planck_c2 = 0.01438769;
-
-
-double
-plancki(w, T)
-  double w, T;
-{
-  double b, h, y, bw;
-
-  b = T / planck_c2;
-  bw = b * w;
-
-  if (bw > 0.59375)
-    {
-      y = b * b;
-      h = y * y;
-      /* Right tail.  */
-      y = planckc (w, T);
-      /* pi^4 / 15  */
-      y =  6.493939402266829149096 * planck_c1 * h  -  y;
-      return y;
-    }
-
-  h = exp(-planck_c2/(w*T));
-  y =      6. * polylog (4, h)  * bw;
-  y = (y + 6. * polylog (3, h)) * bw;
-  y = (y + 3. * polylog (2, h)) * bw;
-  y = (y          - log1p (-h)) * bw;
-  h = w * w;
-  h = h * h;
-  y = y * (planck_c1 / h);
-  return y;
-}
-
-/*							planckc
- *
- *	Complemented Planck radiation integral
- *
- *
- *
- * SYNOPSIS:
- *
- * double lambda, T, y, planckc();
- *
- * y = planckc( lambda, T );
- *
- *
- *
- * DESCRIPTION:
- *
- *  Integral from w to infinity (area under right hand tail)
- *  of Planck's radiation formula.
- *
- *  The program for large lambda uses an asymptotic series in inverse
- *  powers of the wavelength.
- *
- * ACCURACY:
- *
- *                      Relative error.
- *   The domain refers to lambda T / c2.
- * arithmetic   domain     # trials      peak         rms
- *    IEEE      0.6, 10      50000      1.1e-15     2.2e-16
- *
- */
-
-double
-planckc (w, T)
-     double w;
-     double T;
-{
-  double b, d, p, u, y;
-
-  b = T / planck_c2;
-  d = b*w;
-  if (d <= 0.59375)
-    {
-      y =  6.493939402266829149096 * planck_c1 * b*b*b*b;
-      return (y - plancki(w,T));
-    }
-  u = 1.0/d;
-  p = u * u;
-#if 0
-  y = 236364091.*p/365866013534056632601804800000.;
-  y = (y - 15458917./475677107995483570176000000.)*p;
-  y = (y + 174611./123104841613737984000000.)*p;
-  y = (y - 43867./643745871363538944000.)*p;
-  y = ((y + 3617./1081289781411840000.)*p - 1./5928123801600.)*p;
-  y = ((y + 691./78460462080000.)*p - 1./2075673600.)*p;
-  y = ((((y + 1./35481600.)*p - 1.0/544320.)*p + 1.0/6720.)*p -  1./40.)*p;
-  y = y + log(d * expm1(u));
-  y = y - 5.*u/8. + 1./3.;
-#else
-  y = -236364091.*p/45733251691757079075225600000.;
-  y = (y + 77683./352527500984795136000000.)*p;
-  y = (y - 174611./18465726242060697600000.)*p;
-  y = (y + 43867./107290978560589824000.)*p;
-  y = ((y - 3617./202741834014720000.)*p + 1./1270312243200.)*p;
-  y = ((y - 691./19615115520000.)*p + 1./622702080.)*p;
-  y = ((((y - 1./13305600.)*p + 1./272160.)*p - 1./5040.)*p + 1./60.)*p;
-  y = y - 0.125*u + 1./3.;
-#endif
-  y = y * planck_c1 * b / (w*w*w);
-  return y;
-}
-
-
-/*							planckd
- *
- *	Planck's black body radiation formula
- *
- *
- *
- * SYNOPSIS:
- *
- * double lambda, T, y, planckd();
- *
- * y = planckd( lambda, T );
- *
- *
- *
- * DESCRIPTION:
- *
- *  Evaluates Planck's radiation formula
- *                      -5
- *            c1  lambda
- *     E =  ------------------
- *            c2/(lambda T)
- *           e             - 1
- *
- */
-
-double
-planckd(w, T)
-  double w, T;
-{
-   return (planck_c2 / ((w*w*w*w*w) * (exp(planck_c2/(w*T)) - 1.0)));
-}
-
-
-/* Wavelength, w, of maximum radiation at given temperature T.
-   c2/wT = constant
-   Wein displacement law.
-  */
-double
-planckw(T)
-  double T;
-{
-  return (planck_c2 / (4.96511423174427630 * T));
-}