Some improvements to math-finance based on feedback.
Some improvements to math-finance based on feedback.

mcandre/factor,seckar/factor,factor/factor,mcandre/factor,dharmatech/factor,mrjbq7/factor,dharmatech/factor,mrjbq7/factor,mcandre/factor,Keyholder/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,mrjbq7/factor,kingcons/factor,tgunr/factor,nicolas-p/factor,bpollack/factor,nicolas-p/factor,dch/factor,tgunr/factor,AlexIljin/factor,slavapestov/factor,littledan/Factor,erg/factor,bpollack/factor,erg/factor,mcandre/factor,slavapestov/factor,bpollack/factor,AlexIljin/factor,erg/factor,slavapestov/factor,littledan/Factor,erg/factor,bjourne/factor,factor/factor,cataska/factor,nicolas-p/factor,cataska/factor,erg/factor,dch/factor,bjourne/factor,slavapestov/factor,sarvex/factor-lang,littledan/Factor,Keyholder/factor,mcandre/factor,AlexIljin/factor,jwmerrill/factor,mrjbq7/factor,bjourne/factor,nicolas-p/factor,factor/factor,mcandre/factor,sarvex/factor-lang,AlexIljin/factor,dch/factor,nicolas-p/factor,jwmerrill/factor,erg/factor,kingcons/factor,cataska/factor,AlexIljin/factor,ceninan/factor,bpollack/factor,kingcons/factor,erg/factor,seckar/factor,ceninan/factor,slavapestov/factor,bjourne/factor,factor/factor,tgunr/factor,ehird/factor,slavapestov/factor,dch/factor,littledan/Factor,ceninan/factor,sarvex/factor-lang,cataska/factor,tgunr/factor,slavapestov/factor,dch/factor,dch/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,mcandre/factor,Keyholder/factor,mrjbq7/factor,sarvex/factor-lang,dharmatech/factor,sarvex/factor-lang,bpollack/factor,kingcons/factor,sarvex/factor-lang,tgunr/factor,sarvex/factor-lang,seckar/factor,jwmerrill/factor,ceninan/factor,bjourne/factor,nicolas-p/factor,mrjbq7/factor,factor/factor,nicolas-p/factor,ehird/factor,factor/factor,tgunr/factor,ehird/factor