John Cremona

@tornaria Thanks. I am cleaning up the code in periods.cc some more as well. myg0(x) is just exp(-x) and for r>0 (not just r>1) mygr(x) is redundant, begin handled better...

@tornaria if you can test the current commit d209a2d please would you do so and report here? I think it is better, pending more work to use a library which...

Thanks -- I put in both your suggestions. I may tag and make a new release soon.

I would like to add to the requests by @roed314 and @edgarcosta . With Sage 9.5 due to be released soon it would be unfortunate for this problem to still...