Known Issues
Series
Wolfram changes the way Series
works between Versions 5.0 and 5.1. Series is not any more "mapped"
over sums and products, in which case a crude Taylor expansion is
attempted. The consequences are desastrous:
- f
and 1+f
are not treated the same way in Series
- f and 2*f
are not treated the same way in Series
Therefore Series of expression containing HPLs might behave strangely,
especially when expanding around a logarithmic singularity. A
work around is to first expand the HPLs separately, then the whole
expression. Suppose you want to expand an expression x containing HPLs of argument t
around t=0
to order n.
x/.h_HPL
:> Series[h,{t,0,m}]
where m is large enough to
ensure that no term gets lost if the rest of the expression x
contains 1/t^k
poles. The fact that the the HPLs are in a SeriesData
form should automatically trigger the expansion of x.
Installation
Sometimes Mathematica does not look for init.m files in the AutoLoad
directory, as a consequence it does not find the HPL package and
related files. A work-around is to link (or copy) the init.m file from
the .Mathematica/AutoLoad/
directory into .Mathematica/Kernel/.
If there is already an init.m file
there, append the content of the .Mathematica/AutoLoad/init.m
to that of .Mathematica/Kernel/init.m.