trigcat.spad line 19

Category for the elementary functions.

^: (%, %) -> %
x^y returns x to the power y.
exp: % -> %
exp(x) returns %e to the power x.
log: % -> %
log(x) returns the natural logarithm of x. When evaluated into some subset of the complex numbers, the branch cut lies along the negative real axis, continuous with quadrant II. The domain does not contain the origin.