Mathematical formulas  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Mathematical formulas (/thread23112.html) 
Mathematical formulas  Tomas Anderson  10152002 Hi,
Kind regards, Re: Mathematical formulas  Vieira, Luiz C. (Brazil)  10152002 Hello; maybe I'm wrong, but it seems you wanted to address your post to HewlettPackard Company itself. In fact, this Museum and particularly this Forum are exclusively private initiative. Anyway, about the formulas: I know the IRR and about all related financial formulas used in HewlettPackard calculators can be found at the HP12C's "Owner's Handbook and Programming Guide", Appendix D, titled "Formulas Used". This manual also refers to other specific publications in particular cases, like Standard Securities Calculation Methods as a reference for Bond calculations. Hope it helps. But if you still need the formulas, feel free contacting me so I can send you more info.
Best regards.
Re: Mathematical formulas  Math Geek  10182002 I do not know exactly what HP uses, but I have a functional set derived using the 28S algebraic equation solver, if you are interested.
Email me if you want me to send them.
Re: Mathematical formulas  Tomas Anderson  10232002 Hi Math, Many thanks for your response. I would very much like to receive the set of 28S algebraic equation solver.
Tomas
