Normalize 'lambertW'
Misc cleanups
Fix out of bounds index
Cleanup newpoly.spad and prs.spad
Change signature of 'split!'
Add subSylvesterMatrix, subResultant, subResultantList
Move *trim from StringAggregate to LinearAggregate
Cleanups and improvements
More efficient 'pseudoQuotient' in UPOLYC
Simplify 'pseudoRemainder' and 'pseudoDivide'