Haggai Landa

Hi, I struggled with this cygwin problem as well for a bit (and found this issue here exactly after I managed to solve it :) The C++ standard reserves identifiers...

@mtfishman could you please advise on the preferred naming convention for the local variables `_N`, `_M`, `_Rrows` that I will rename in the PR? Should I just add an initial...

`N_` should be ok - I'll test locally and will PR if it's good. Thanks.