Thu Nov 7 11:31:58 MET 2002 Hans Schoenemann <hannes@mathematik.uni-kl.de>
interface to NTL (optional, recommended): tested with NTL 5.2, 5.3
bug fixes for multivariate factorization
Tue Apr 10 15:24:49 CEST 2001 Hans Schoenemann <hannes@mathematik.uni-kl.de>
several small bugs fixed (mostly memory leaks)
changed copyright to GPL
Tue Oct 28 14:46:08 1997 Jens Schmidt <schmidt@mathematik.uni-kl.de>
New features in Factory, version 1.3b:
======================================
Distribution and organization level:
------------------------------------
o The new external variable `factoryConfiguration' describes the
configuration Factory has been translated with.
o If configuring for cross compiling `configure' assumes that the target
machine has arithmetic shift.
o Parts of Factory are written using `folding-mode' for GNU Emacs. Since
this is a really useful feature `folding.el' has been added to the
distribution.
o The new `make' target `installtest' in the top level `GNUmakefile' tests
whether the installation has been successful.
o The new directory `examples/' contains some example applications for
Factory and a `GNUmakefile' to build them.
Source code level:
------------------
o The main interface to Factory, the class `CanonicalForm' has been (almost
completely) revised. During this process, a number of smaller bugs has
been fixed (most of the bugs concerning some more or less exceptional
cases). Furthermore, many of the methods became a little bit faster,
some of them became a lot faster (e.g., the evaluation-`operator() ()' uses
Horner's rule now, `degree( const & Variable )' and `deriv( const &
Variable)' do not use expensive calls to `swapvar()' any longer).
o In the same way, I have begun to revise the gcd calculations, but there is
still is a lot of work to do. As a first result, gcd calculations over Z
became faster (up to a factor of two for large examples).
Other bug fixes:
o A serious bug in `resultant()' has been fixed.
o `gcd()' works correctly now for polynomials with rational coefficients.
However, `factorize()' still does not, and you have to multiply with the
common denominator before factorizing.
o `psr( CF f, CF g, Var x )', `psq()', `psrq()' work correctly now if
degree(f) < degree(g). However, they still do not work correctly if
either in divisor or dividend occur variables with level higher than
x's level.
o A bug in `CanonicalForm::sqrt()' has been fixed which in some cases made
`factorize()' crash.
Changes:
o If CO has not a denominator `CanonicalForm::den()' returns now the unity
from the current domain, not the unity from the domain of CO.
o `chineseRemainder()' works now for polynomials over Z instead for elements
of Z only.
o `cden()' computes the common denominator with respect to algebraic
variables, too, so multiplying with `cden()' in any case results in an
object with integral coefficients
New features:
o The new function `subResChain()' returns the extended subresultant chain
of two polynomials.
o The new function `replacevar()' replaces one variable with another. In
contrast to `swapvar()', this works for algebraic variables, too.
o The new function `size()' returns the number of monomials occuring in a
`CanonicalForm'.
o The new method `CanonicalForm::Lc()' returns the leading coefficient of
CO, where elements from an algebraic extension are considered
coefficients, and not polynomials.
Thu Jul 17 10:15:59 1997 Jens Schmidt <schmidt@mathematik.uni-kl.de>
New features in Factory, version 1.3a:
======================================
Besides minor changes at "source code level" (bug fixes, new features)
which are not really visible to the user in general there are quite a lot
of changes at "organization level" (aka "preprocessor level") and at
"distribution level" (`configure', `GNUmakefile').
Source code level:
------------------
o Serious bug in univariate factorization in characterstic 0 fixed (by
Ruediger Stobbe).
o New gcd algorithm (sparse modular), not fully tested by now (contributed
by Marion Bruder). Switch on with `SW_USE_SPARSEMOD'.
o Various minor bug fixes.
Organization level:
-------------------
o Factory translates now on Macintosh with Metroworks
CodeWarrior Academic Pro 11 (changes by Wilfred Pohl)
o So called "new" memory manager (written by Ruediger Stobbe) added to
distribution. So far no timigs available which memory manager is faster.
o "ASSERT", "DEBOUT", "TIMING macros" streamlined
o Factory's IO completely re-organized (that was a mess!). It is now
possible to switch off everything which is related to stream IO (use
`--disbale-streamio' option to `configure'). This way it is possible to
link Factory without `libg++.a' or `libiostream.a'. Changes include:
- everything related to stream IO wrapped by `#ifndef NOSTREAMIO'
- all error messages/debug output messages rewritten so that they use the
"ASSERT" and "DEBOUT macros"
- furthermore, it was necessary to change the way the GF(q) tables are
read. As a consequence, the format of the GF(q) tables slightly
changed, too. You have to generate/get them from net by new.
Distribution level:
-------------------
o The organization of the distribution as well as the compile/install
procedure totally changed. It is now more GNU-like. See the `INSTALL'
file and the `README' file for more information.
o The file names of the template sources changed. To make them less
canonical, all names are prefixed with `ftmpl_' ("Factory template") now.
o The installation target directories and their structure changed a little
bit. See the `INSTALL' file for more information.
Before May 3 1997 Jens Schmidt <schmidt@mathematik.uni-kl.de>
New features in Factory, version 1.2c:
======================================
Version 1.2c is a more or less inofficial version distributed with
Singular 1.0. I hope it does not distribute too far... The description of
new features to version 1.3a cope the description of new features to this
version.
