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there are about 8 pages of changes since the last packaged version (1.0.29).
A complete list may be found at http://www.xs4all.nl/~apinkus/infoindex.html
the changes include a large number of bug fixes, several new features such as
- Implemented ContFrac, which makes a continued fraction expansion of a number.
- Implemented Decimal. Decimal calculates an infinite decimal representation
of a number.
- Implemented LagrangeInterpolant, a way to create a polynomial that goes
through certain points.
- Implemented Select, which can select certain elements from a list based on
a predicate test function.
- Half-integer factorials (sent in by Serge Winitzki)
- Added GetPrimeFactors.
- Implemented RandomIntegerVector, RandomPoly.
plus several others.
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* added a directory colorcode with code to htmlize the scripts. it also color-highlights
the code. Try it out by typing './colorcode' in that directory, and then
'netscape scriptsmain.html'
* Pattern matching code optimized a little.
* SylvesterMatrix, code supplied by James Gilbertson.
* MatrixRow, MatrixColumn, and GenMatrix supplied by James Gilbertson.
* changed Intersection and Difference, so they handle lists with multiple identical
elements correctly.
* Fixed the D(x)x+y bug reported by Fred Bacon.
* Fixed the Gcd(x,x) bug reported by Scott.
* added Factorize({list}). Factorize(1 .. 4) should now return the same as 4! for instance.
* Added Content and PrimitivePart to the univariate polynomial code. See the manual for an
explanation of these functions.
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Yacas (Yet Another Computer Algebra System) is a small and highly flexible
computer algebra language. The syntax uses a infix-operator grammar
parser. The distribution contains a small library of mathematical functions,
but its real strength is in the language in which you can easily write your
own symbolic manipulation algorithms. It supports arbitrary precision
arithmetic.
The current version is 1.0.28 (the first release was 1.0.0). The language is
very much in a finished state. Any code written for it should be usable in
future versions. Also, the language should prove very easy to learn.
Yacas is written in very clean c++ code, and is very portable . It can compile
stand-alone, and is easily embeddable. Yacas contains a native arbitrary
precision arithmetic module, but can also be used with GMP.
Things implemented include: arbitrary precision, rational numeric, vector,
complex, and matrix computations (including inverses and determinants and
solving matrix equations), derivatives, solving, Taylor series, numerical
solving (Newtons method), and a lot more non-mathematical algorithms. The
language natively supports variables and user-defined functions. There is
basic support for polynomials.
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