Category : Science and Education
Archive : PFSA.ZIP
Filename : -README
Output of file : -README contained in archive : PFSA.ZIP
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ÍÍÍÍÍÍ͹ ED002: PFSA ÌÍÍÍÍÍÍÍ
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The PFSA program was created to do some rather large but simple
algebraic computations. PFSA does not have the large variety of
commands which more general purpose symbolic algebra programs (muMath
and Macsyma) have but it is faster and can work with bigger
expressions. PfSA ran 90 times faster than Macsyma on a very large
Hamiltonian canonical transformation project, and it runs more than 200
times faster than muMath when doing example E. PFSA is written in
Fortran and the arithmetic involving coefficients of terms is done with
the Fortran arithmetic. Two versions are provided, one which uses only
rational integer*4 arithmetic (PFSAI.EXE) and another (PFSAF.EXE) which
uses real*8 arithmetic during calculation of coefficients.
The author of PFSA tried to make the usage of PFSA simple. PFSA
reads a file "algin", processes the commands therein, and produces a
file "algout". The commands in the algin file are mostly close enough
to ordinary English so that the algebra to be performed is clear even
to an inexperienced reader. PFSA commands allow one to do standard
operations on polynomial expressions (addition, subtraction,
multiplication, selection of portions of expressions, substitutions,
differentiation). Binomial expansions may be generated with
non-integer exponents. Numerical evaluation may be done by doing
substitutions. Procedures may be defined. The commands are listed and
described in PFSA.DOC.
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Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/