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.