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Macaulay2 v1.24.05

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@mahrud mahrud released this 15 May 04:21
release-1.24.05
ec9e9ac
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d-torrance Doug Torrance
GPG key ID: 91DC4A779EC5C910
Learn about vigilant mode.

New GitHub Contributors and Package Authors

  • Antonino Ficarra
  • Maya Banks
  • Alessio Borzì
  • Eduardo Torres Davila
  • Antonino Ficarra
  • Tara Gomes
  • Emanuele Sgroi (@EmanueleSgroi) made their first contribution in #3154
  • Prashanth Sridhar

Changelog

  • packages that have been published and certified:
    • "a gold star" CotangentSchubert, a package by Paul Zinn-Justin for Cotangent Schubert calculus, has been published.
    • "a gold star" GeometricDecomposability, a package by Mike Cummings and Adam Van Tuyl to check whether ideals are geometrically vertex decomposable, has been published.
    • "a gold star" InvariantRing, a package by Luigi Ferraro, Federico Galetto, Francesca Gandini, Hang Huang, Thomas Hawes, Matthew Mastroeni, and Xianglong Ni for invariants of group actions, has been published.
    • "a gold star" MultiplicitySequence, a package by Justin Chen, Youngsu Kim, and Jonathan Montaño for computing the multiplicity sequence of an ideal, has been published.
    • "a gold star" Probability, a package by Doug Torrance for basic probability functions, has been published.
    • "a gold star" TropicalToric, a package by Alessio Borzì on tropical methods for toric intersection theory, has been published.
  • new packages:
    • MultigradedBGG, a package by Maya Banks, Michael K. Brown, Tara Gomes, Prashanth Sridhar, Eduardo Torres Davila, and Sasha Zotine for the multigraded BGG correspondence and differential modules, has been added.
    • TropicalToric, a package by Alessio Borzì on tropical methods for toric intersection theory, has been added.
    • VNumber, a package by Antonino Ficarra and Emanuele Sgroi to compute v-number of homogeneous ideals and v-function of monomial ideals, has been added.
  • improved packages:
    • Many FourTiTwo methods now have a Precision option for setting the integer precision used by 4ti2.
    • GeometricDecomposability has been updated to version 1.4.1 with minor updates.
    • NumericalAlgebraicGeometry has been updated to version 1.24 with small updates.
    • PositivityToricBundles has been updated to version 1.7, adding several new methods, fixing bugs, and updating the documentation and tests.
    • ToricVectorBundles has been updated to version 1.2 with updated documentation.
    • WhitneyStratifications has been updated to version 2.03, adding new routines to stratify algebraic maps to the package. The update also includes several performance improvements and bug fixes.
  • functionality added or improved:
    • It is now possible to create a fraction field of an iterated polymial ring using frac.
    • A number of new operators have been added that may be used for defining methods. See ^!, !, ^~, ~, ^>, ^>=, ^<, ^<=, >, >=, <, <=, |, and |=.
    • A number of improvements have been made to parallelization. In particular:
      • The function getIOThreadMode has been added for determining the current I/O thread mode.
      • The functions setIOExclusive, setIOSynchronized, and setIOUnSynchronized now also accept a file as an argument.
      • The default I/O thread mode has been changed from 0 (unsynchronized) to 1 (synchronized).
      • Much of the code (e.g., reading mutable hash tables) is now thread safe.
      • The output of GCstats has been improved.
      • The initial heap size used by the garbage collector has been increased and the free space divisor has been decreased.
      • The taskResult function now waits until a task is finished before returning its result.
      • The parallelApply function has been added for applying a function to a list in parallel.
      • The output when using the time keyword now includes the time used by the current thread and in garbage collection.
      • The keyword threadVariable has been renamed to threadLocal, although the former still exists as a synonym.
        See parallel programming with threads and tasks for more.
    • The hash counter for mutable hash tables increases much more slowly, decreasing the likelihood of overflowing.
    • The take function will now accept a two-element list as its second element if the class of the first element has a iterator method installed.
    • Broken links to the Journal of Software for Algebra and Geometry have been fixed in the documentation for older certified packages.
    • The documentation page for each certified package now includes its DOI.
    • The union function has been added for sets.
    • The intersect and intersection functions now work for sets.
    • Creating integer quotient rings using ZZ/n now works when n is large and/or composite.
    • The syntax g \\ f as a synonym for f // g when f and g are matrices has been deprecated. It will be replaced in the next release.
    • Modules may now be compared using <, <=, >, and >=, by their ranks and degrees. In particular, lists of modules may now be sorted.
    • The method homomorphism(Vector) was added for getting the homomorphism from an element of a Hom module.
    • The method random(Module) was added for generating random elements of modules.
    • The method all(BasicList) was added for checking if all elements of a list of booleans are true.
    • The method position(ZZ,Function) was added for finding the smallest index for which a function returns true.

Contributors

EmanueleSgroi
Assets 2