{\tt D200 RKSTP:} {\bf First-Order Differential Equations (Runge--Kutta)}
Subroutine subprogram {\tt D209 RKSTP} (First-order differential
equations (Runge--Kutta)) in KERNLIB has been reissued
as {\tt D200 RKSTP} in MATHLIB. Apart from the change of libraries,
and the suppression of error condition {\tt D209.1}
({\tt N} $<$ {\tt 1}), this has no influence on its usage.
{\tt C337 REXPIN:} {\bf Exponential Integral}
Function subprogram {\tt C337 REXPIN} (Exponential Integral), with
entries {\tt REXPIN} and {\tt REXPIE}, written in Fortran,
which calculates the exponential integral $E_1(x)$ and $e^x\,E_1(x)$
for real argument, has been submitted to MATHLIB.
In addition, a double-precision version {\tt DEXPIN} with entries
{\tt DEXPIN} and {\tt DEXPIE} is provided on IBM
and similar computers. This subprogram replaces function subprogram
{\tt C337 EXPINT} with entries {\tt EXPINT} and {\tt DEXPIN}
in KERNLIB, which calculated $E_1(x)$ only.
For convenience, the old entry name {\tt EXPINT} is kept
for a transitional period. It will eventually be deleted.
{\tt E406 CHECF:} {\bf Chebyshev Series Coefficients of a Function}
Function subprogram {\tt E406 DCHECF} (Chebyshev Series Coefficients
of a function) in MATHLIB has been reissued as {\tt E406 CHECF}
(Coefficients for Chebyshev Series of a Function).
In addition, an entry {\tt QCHECF} has been provided, which allows to
calculate these coefficients in {\tt REAL*16} mode on IBM and
similar computers.