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E.1 News and changes


News for version 4-0-2

New commands:

Change in ring handling:

  • typeof( qring ) returns "ring"

New libraries:

  • algemodstd.lib: Groebner bases of ideals in polynomial rings over algebraic number fields( algemodstd_lib)
  • arr.lib: arrangements of hyperplanes ( arr_lib)
  • brillnoether.lib: Riemann-Roch spaces of divisors on curve ( brillnoether_lib)
  • hess.lib: Riemann-Roch space of divisors on function fields and curves ( hess_lib)
  • gradedModules.lib: graded modules/matrices/resolutions ( gradedModules_lib)

Changed libraries:

News for version 4-0-1

Version 4-0-1 is a bug fix release.

New feature: attribute ring_cf for ring.

News for version 4-0-0

Version 4-0-0 is a milestone relase of Singular. The new release series 4 aims for an entirely modularized architecture simplifying connectivity with other systems and paving the way for parallel computations. As a first step in modularization, the new release features an internal structural separation of coefficient rings and polynomial rings. This allows for a flexible integration of new coefficient rings.

SINGULAR 4-0-0's list of new functionality and significant improvements further extends that of the 3-1-6/7 prerelease series.

New functionality

  • de Rham cohomology of complements of algebraic varieties ( derham_lib)
  • Gromov-Witten numbers of elliptic curves ( ellipticcovers_lib)
  • classification of isolated complete intersection singularities in characteristic 0 ( classifyci_lib)
  • parametrization of orbits of unipotent actions ( orbitparam_lib)
  • F5-like Groebner basis algorithm ( sba)
  • element-wise application of functions to data structures ( apply)
  • support for debugging libraries ( ASSUME)

Improved functionality


SINGULAR is available as source code and for Linux, Mac OS X, Windows, FreeBSD and SunOS-5.