them(1) - phpMan

compare (1)          - mathematically and visually annotate the difference be...
complex (7)          - basics of complex mathematics
ExtUtils::Liblist (3pm) - determine libraries to use and how to use them
math.h (0p)          - mathematical declarations
Math::Complex (3pm)  - complex numbers and associated mathematical functions
math_error (7)       - detecting errors from mathematical functions
portreserve (1)      - reserve ports to prevent portmap mapping them
repotrack (1)        - track a package and its dependencies and download them