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1@comment -*-texinfo-*-
2@comment $Id: NEWS.plural.texi,v 1.5 2009-04-15 10:41:14 seelisch Exp $
3@comment this file contains the News about Singular versions
4@comment Unix
5@ifclear VERSION
6@include version.texi
7@end ifclear
9@majorheading NEWS in SINGULAR::PLURAL @value{VERSION}
11@ifclear singularmanual
12@macro nref{what}
14@end macro
15@end ifclear
17@ifset singularmanual
18@macro nref{what}
20@end macro
21@end ifset
23The current version @value{VERSION} is the second pre-release
24of the upcoming release series version 2-1. Therefore, some
25command names are still subject to change.
27Singular::Plural version 2-1 is generally much faster than any previous
28experimental version of Singular::Plural, due to a rewrite of major parts
29of the @sc{Singular} kernel (e.g., the kernel has a new memory manager
30and a new polynomial arithmetic) and due to new and better implemented algorithms (e.g., for two-sided Groebner bases and generally, for computations
31in factor algebras).
33Besides theses internal changes, Singular::Plural version 2-1 offers many new
34features and functionalities.
36@heading Efficiency Improvements
37The following table shows some timings which compare the efficiency of
38@sc{Singular}: Plural version 0-9-9 and @sc{Singular} version 2-1-2.
39All times are in seconds
40and were obtained on HP 160 workstation with 512 MB RAM running HP-UX 10.20.
42@multitable @columnfractions .50 .20 .20 .15
43@item @strong{Example} @tab @strong{0-9} @tab @strong{2-1} @tab @strong{Speedup}
44@c @item @uref{,,mora_1} @tab std  @tab 32003,x(1..3),ds @tab 82 @tab 9.4 @tab 8.7
46@item AnnFD-sl2-4 @tab 3.34       @tab 0.92    @tab 3.6
47@item TwoGB-g2-3  @tab 24577      @tab 165     @tab  149
48@item ucha4       @tab 12.9       @tab 8.5     @tab  1.5
49@item ucha2       @tab 44.3 hrs @tab 9 hrs @tab  4.9
50@end multitable
52@heading (Commutative) Factorizing algorithms revisited
53Starting with version 2-0-4, we use NTL (of Victor Shoup) for factoring
54univariate polynomials. The multivariate factoring code in libfac/factory
55does now also work over algebraic extension fields.
57@heading General Changes
58@table @asis
59@item @nref{Emacs user interface}
60the recommended interface for using @sc{Singular::Plural}
61@item @code{EPlural}
62new program for an out-of-the-box, pre-customized Emacs which runs
64@item @nref{The online help system}
65choose in which browser the on-line help is displayed;
66@*wildcard expansion of help topics
67@*new layout of html manual pages
68@item @nref{Source code debugger}
69interactive debugging of procedures written in the @sc{Singular}
72New WWW home-site of @sc{Plural}
73@end table
75@heading @sc{Singular::Plural} libraries
77@table @asis
78@item @nref{lieA_lib} Plural definitions of several series of enveloping algebras of simple Lie algebras
79@end table
82@heading Internal Changes
83@table @asis
84@item new data structures for monomials and polynomials
85Makes polynomial arithmetic significantly faster: Especially for block -
86or weighted orderings.
87Bucket representation of polynomials in std and NF;
88Ring change during std-related computations
89(resulting in more speed and less space consumption).
90@item new memory management
91Results is less memory usage, faster memory allocation/free, less
92fragmentation, much better locality of reference.
93@end table
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