# New on CTAN: amscdx

The original amscd package provides a CD environment that emulates the commutative diagram capabilities of AMS-TeX version 2.x. This means that only simple rectangular diagrams are supported, with no diagonal arrows or more exotic features. This enhancement package implements double (“fat”), dashed, and bidirectional arrows (left-right and up-down), and color attributes for arrows and their annotations. The restriction to rectangular geometry remains. This nevertheless allows the drawing of a much broader class of “commutative-diagram-like” diagrams.

The package’s Catalogue entry can be viewed at https://ctan.org/pkg/amscdx The package’s files themselves can be inspected at http://mirror.ctan.org/macros/latex/contrib/amscdx/

Thanks for the upload. For the CTAN Team Petra Rübe-Pugliese

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## amscdx – Enhanced commutative diagrams

The original amscd package provides a CD environment that emulates the commutative diagram capabilities of AMS-TeX version 2.x. This means that only simple rectangular diagrams are supported, with no diagonal arrows or more exotic features.

This enhancement package implements double (“fat”), dashed, and bidirectional arrows (left-right and up-down), and color attributes for arrows and their annotations. The restriction to rectangular geometry remains. This nevertheless allows the drawing of a much broader class of “commutative-diagram-like” diagrams.

This update, 2.2x of 2019-07-02, fixes the dashed-arrows parts placement bug, and adds the package option 'lyx', for use with lyx to prevent conflict with the already loaded amscd. The packages xcolor and graphicx are made required.

Package | amscdx |

Version | 2.2x 2019-07-02 |

Copyright | 1995, 1999 American Mathematical Society 2016–2017 LaTeX3 Project and American Mathematical Society 2019 Martin Vermeer |

Maintainer | Martin Vermeer |