RF21 is an enhanced scientific calculator that allows for permanent installation of a user's own
functions, applications and libraries. User functions can have one or many arguments and values.
It's a programming system at the same time - and an archive capable of holding a lifetime's
mathematical work, with comments attached to each function, grouped in theme oriented library files. An integrated searchable database helps find material that you created years ago. Each function will self-reassemble when its name is called, be it for one-time use or from within a
newly created user function.
Standard numeric features can be applied to all formulae and functions. Such as numeric derivation and integration, search for zeroes, extremal points etc., linear equations and matrix
inversion, an n-dimensional function minimizer (works by the Dennis & Schnabel algorithm),
a solver for nonlinear equation systems. Monte Carlo simulations. Screenplots and printable,
mouse editable "designer plots".
Predefined functions include the gamma, zeta and psi-functions, Euler and Bernoulli numbers,
elliptic integrals, cumulative Binomial distribution and more. Sample libraries containing applications such as: eigenvalues, characteristic polynomials, Keplerian orbits, geodesic travel
routes, diophantic problems, partition numbers, combinatorics and stochastics. Comprehensive
written documentation available from the author's homepage. |
