News

• $D$-dimensional Dirac algebra (see e.g. DiracTrace)
• New transformation for Dirac algebra: DiracSimplify, DiracOrder and SpinorsSimplify
• setMandelstam5: generalised mandelstam variables for $2 \to 3$ processes
• Improved behaviour of DiracTrace
• New featured transformation: ExpandTensors
• Sugar: InvertIndices, FullySymmetrize, FullyAntiSymmetrize and Identity transformations

• Several bugfixes (including #CORE-179) and performance improvements
• Output style for WolframMathematica OutputFormat changes: now a^b instead of Power[a, b]
• Added Quiet block (suppresses all exceptions and output): Quiet { 1/0 }
• Get index by type t.indices[1, LatinUpper] will give first Latin capital index

To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.9')

or download new .jar from the downloads page.

This update includes various bug fixes (in particular #CORE-177 and #CORE-178) and improvements.

Two major things happened: the new version of the site with comprehensive documentation and search engine is now ready and Redberry version 1.1.7 released. This major release includes many fixes, performance and syntax improvements. To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.7')

Redberry version 1.1.6 is now available. This release includes many fixes and performance improvements. To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.6')

This release introduces complete implementation of permutation groups including set stabilizers, centralizers, membeship testing etc. For details see API docs.

Redberry version 1.1.6-RC1 is now available. To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.6-RC1')

Features highlights:

• Derivatives: introducing the representation of derivatives in Redberry.
• New transformations: new transformations implemented.
• Reduce tensorial equations: reduce and solve equations with tensors.
• Generate tensor: generate tensor of the most general form.

To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.5')

or download new .jar from the downloads page.

Lear more about this update here.

Redberry issue & bug tracker and project managment migrated to YouTrack: visit it at youtrack.redberry.cc/issues. The old Bitbucket issue tracker is now closed.

We are very grateful to JetBrains company who provided YouTrack and cloud hosting for free for our project.

Issues fixed:

• Field substitution with fixed argument bug fixed.
• minor issues and optimizations

To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.2')

or download a new .jar from the downloads page.

Issues fixed:

• #92: Factor with rational powers of variables throws exception
• #95: Substitutions of fields with fixed arguments not take into account signs of arguments
• #77: Bug in standard form of powers of a product
• and other minor issues in transformations

To update your Redberry simply change version in your Groovy Grapes:

@Grab(group = 'cc.redberry', module = 'groovy', version = '1.1.1')

or download a new .jar from the downloads page.

Since the publication of the article, many people tried out Redberry in action. We are grateful to these people for their feedback and bugs detection. Several major bugs affects issues #92, #95 and #77 and will be fixed soon.

Fill free to post your bug reports and feature requests at Redberry issue tracker or send us email with your questions.

Example: quark-gluon scattering in QCD axial gauge.

Compton scattering in QCD axial gauge is added to the tutorials page.

Paper with the description of basic features and architectural solutions applied in Redberry is now published in arXiv.

Redberry version 1.1 released.