1 | @comment -*-texinfo-*- |
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2 | @comment $Id: NEWS.texi,v 1.49 2005-05-23 15:35:37 levandov Exp $ |
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3 | @comment this file contains the News about Singular versions |
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4 | @comment Unix |
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5 | @ifclear VERSION |
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6 | @include version.texi |
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7 | @end ifclear |
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8 | |
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9 | @majorheading NEWS in SINGULAR @value{VERSION} |
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10 | |
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11 | @ifclear singularmanual |
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12 | @macro nref{what} |
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13 | \what\ |
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14 | @end macro |
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15 | @end ifclear |
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16 | |
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17 | @ifset singularmanual |
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18 | @macro nref{what} |
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19 | @ref{\what\} |
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20 | @end macro |
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21 | @end ifset |
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22 | |
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23 | The current version @value{VERSION} is a pre-release to the new |
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24 | release series version 3-0. |
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25 | |
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26 | Singular version 3 has a greater functionality and an improved architecture. |
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27 | Major new features are: |
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28 | @itemize |
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29 | @item |
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30 | @nref{Dynamic modules} |
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31 | @item |
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32 | non-commutative extension @nref{PLURAL} |
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33 | @item |
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34 | name spaces (@nref{package}) |
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35 | @item |
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36 | easy manipulation of rings (@nref{ringlist}) |
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37 | @item |
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38 | improved speed of maps (@nref{subst}, @nref{map}) |
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39 | @item |
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40 | variant of Faugeres F4: @nref{slimgb}. |
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41 | @item |
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42 | improved factorization (integration of NTL, factorization over algebraic extensions, |
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43 | zeroset.lib) |
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44 | @item |
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45 | improved gcd of polynomials (including bug fixes) |
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46 | @item |
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47 | ports to more architectures including automatic building from source (fink on Mac, ebuild on Gentoo) |
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48 | @item |
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49 | more help browser supported, user extendable (help.cnf) |
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50 | @item |
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51 | many bugs fixed |
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52 | @end itemize |
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53 | Besides theses internal changes, Singular version 3 offers many new |
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54 | features and functionalities (which were partly already incorporated in |
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55 | the 2-0 series). |
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56 | |
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57 | @heading Factorizing algorithms revisited |
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58 | Starting with version 2-0-4, we use NTL (of Victor Shoup) for factoring |
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59 | univariate polynomials. The multivariate factoring code in libfac/factory |
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60 | does now also work over algebraic extension fields. |
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61 | |
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62 | @heading New @sc{Singular} libraries |
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63 | |
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64 | Reorganisation of libraries into "Categories". |
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65 | @table @asis |
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66 | @item @nref{control_lib} |
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67 | algebraic analysis tools for System and Control Theory |
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68 | @item @nref{mregular_lib} |
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69 | procedures for computing the Castelnuovo-Mumford regularity |
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70 | @item @nref{mprimdec_lib} |
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71 | procedures for primary decomposition of modules |
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72 | @item @nref{gmspoly_lib}, @nref{gmssing_lib} |
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73 | procedures for the Gauss-Manin connection of a singularity |
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74 | @item @nref{resol_lib} |
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75 | resolution of singularities |
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76 | @item @nref{rootsmr_lib} |
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77 | counting the number of real roots |
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78 | @item @nref{sheafcoh_lib} |
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79 | computing cohomology of sheaves and Tate resolution |
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80 | @item @nref{signcond_lib} |
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81 | computing realizable sign conditions |
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82 | @item @nref{rootsur_lib} |
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83 | counting number of real roots of univariate polynomial |
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84 | @item @nref{grwalk_lib} |
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85 | Groebner and Pertubation walk |
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86 | @end table |
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87 | |
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88 | @heading Changes in @sc{Singular} libraries |
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89 | Many procedures were moved into different libraries, |
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90 | the documentation of libraries was generally improved. |
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91 | |
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92 | All procedures which used to change the current ring return now |
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93 | the newly created ring. |
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94 | @table @asis |
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95 | @end table |
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96 | |
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97 | @heading New @sc{Singular} functions |
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98 | |
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99 | @table @asis |
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100 | @item @nref{ringlist} |
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101 | manipulation of rings |
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102 | @item @nref{slimgb} |
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103 | variant of the F4 algorithm to compute Groebner bases |
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104 | @item @nref{exportto} |
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105 | @item @nref{importfrom} |
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106 | |
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107 | @item @nref{frwalk} |
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108 | fractal walk to change monomial orderings |
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109 | @end table |
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110 | |
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111 | @heading @sc{Singular} functions whose syntax/semantics has changed |
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112 | @table @asis |
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113 | @item @nref{degree} |
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114 | outputs degree and dimension instead of returning an int |
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115 | @item @nref{attrib} |
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116 | new attribute: @code{rowShift} |
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117 | @end table |
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118 | |
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119 | @heading Noncommutative Extension @sc{Plural} |
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120 | |
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121 | Starting with version 3-0-0, @sc{Singular} features a |
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122 | noncommutative extension @sc{Plural}. It allows to |
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123 | set and to compute within noncommutative algebras |
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124 | with PBW basis. Among available algorithms are Groebner |
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125 | bases for left modules, syzygies and resolutions. |
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126 | |
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127 | Together with @sc{Plural} come the following libraries: |
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128 | |
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129 | @table @asis |
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130 | @item @nref{center_lib} |
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131 | computes generators of the center and centralizer subalgebras up |
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132 | to a given degree resp. up to a given number of generators |
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133 | @item @nref{involution_lib} |
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134 | determines linear antiautomorphisms (involutions) and automorphisms |
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135 | @item @nref{gkdim_lib} |
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136 | computes a Gel'fand-Kirillov dimension for modules |
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137 | @item @nref{ncalg_lib} |
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138 | includes ready-to-use funtions for defining many important |
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139 | noncommutative algebras |
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140 | @item @nref{ncdecomp_lib} |
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141 | computes a decomposition of module by its central characters |
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142 | @item @nref{ncalg_lib}, @nref{nctools_lib} |
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143 | contain numerous useful tools for noncommutative algebras |
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144 | @item @nref{qmatrix_lib} |
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145 | procedures, related to quantum matrices and minors |
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146 | @end table |
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147 | |
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148 | @heading Internal Changes |
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149 | @table @asis |
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150 | @item new mapping code |
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151 | @c @item non-commutative extension (Plural) |
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152 | @item factory revisited |
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153 | (gcd, factorizing polynomial over algebraic extension fields,...) |
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154 | @end table |
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155 | |
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156 | @heading Porting |
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157 | |
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158 | @itemize @bullet |
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159 | @item Singular is available for ix86-Linux, HPUX_10, |
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160 | SunOS-5, IRIX-6, ix86-Win (runs on Windows 95/98/NT4/2000/XP), |
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161 | FreeBSD, MacOS X, DecAlpha-Linux, x86_64-Linux (AMD64/Opteron/EM64T), |
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162 | IA64-Linux |
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163 | @end itemize |
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