libsemigroups · james-d-mitchell · Dec 16, 2025 · Dec 16, 2025
diff --git a/.mailmap b/.mailmap
@@ -5,5 +5,6 @@ Joseph Edwards <jde1@st-andrews.ac.uk> Joseph Edwards <josephdavidedwards@gmail.
 James Mitchell <jdm3@st-andrews.ac.uk> James Mitchell <james-d-mitchell@users.noreply.github.com>
 Chinmaya Nagpal <chinmaya1011@gmail.com> Chinmaya Nagpal <cn69@st-andrews.ac.uk>
 Chinmaya Nagpal <chinmaya1011@gmail.com> chinmaya1011 <36993291+chinmaya1011@users.noreply.github.com>
+James Swent <jws20@st-andrews.ac.uk> James Swent <jake@osprey21.com>
 Maria Tsalakou <mt200@st-andrews.ac.uk> Maria Tsalakou <55688065+mariatsalakou@users.noreply.github.com>
 Murray Whyte <mw231@st-andrews.ac.uk> Murray Whyte <42549861+MTWhyte@users.noreply.github.com>
diff --git a/CITATION.cff b/CITATION.cff
@@ -31,7 +31,7 @@ authors:
   - given-names: Murray
     family-names: Whyte
     email: mw231@st-andrews.ac.uk
-    affiliation: "    University of St Andrews"
+    affiliation: University of St Andrews
     orcid: "https://orcid.org/0009-0008-0467-1000"
 identifiers:
   - type: doi
@@ -41,5 +41,5 @@ abstract: >-
   A Python package that wraps the functionality of the C++
   library libsemigroups.
 license: GPL-3.0+
-version: 1.1.0
-date-released: "2025-09-30"
+version: 1.2.0
+date-released: "2025-12-16"
diff --git a/README.md b/README.md
@@ -150,10 +150,10 @@ uv pip install .
 To build `libsemigroups_pybind11` from a release archive:
 
 ```console
-curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.1.0.tar.gz
-tar -xf libsemigroups_pybind11-1.1.0.tar.gz
-rm -f libsemigroups_pybind11-1.1.0.tar.gz
-cd libsemigroups_pybind11-1.1.0
+curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.2.0.tar.gz
+tar -xf libsemigroups_pybind11-1.2.0.tar.gz
+rm -f libsemigroups_pybind11-1.2.0.tar.gz
+cd libsemigroups_pybind11-1.2.0
 pip install .
 ```
 

diff --git a/docs/source/_static/links.rst b/docs/source/_static/links.rst
@@ -3,3 +3,4 @@
 .. _DOT: https://www.graphviz.org/doc/info/lang.html
 .. _Graphviz: https://www.graphviz.org
 .. _pybind11: https://pybind11.readthedocs.io/en/stable/#
+.. _HPCombi: https://libsemigroups.github.io/HPCombi/
diff --git a/docs/source/authors.rst b/docs/source/authors.rst
@@ -30,7 +30,9 @@ Contributors
 - `Nicolas Thiery`_ helped the authors understand the ecosystem for integrating
   C++ code into python, and to some preliminary versions of the python bindings
   for libsemigroups_ using cython, and cppyy.
-- Chinmaya Nagpal (chinmaya1011@gmail.com) resolved some issues with the
+- Chinmaya Nagpal (chinmaya1011@gmail.com) resolved a great many issues with the
   packaging.
+- James Swent (jws20@st-andrews.ac.uk) contributed several implementations for
+  the `to` function and several reduction ordering implementations.
 
 .. _nicolas thiery: https://nicolas.thiery.name/
diff --git a/docs/source/changelog-v1.rst b/docs/source/changelog-v1.rst
@@ -8,6 +8,32 @@
 Changelog - version 1
 =====================
 
+v1.2.0 (released 16/12/2025)
+----------------------------
+
+This is a minor release incorporating a number of bugfixes/improvements in
+libsemigroups_. Support for HPCombi_ transformation types is also added for the
+first time!
+
+* Drop support for Python 3.9 support Python 3.14 by @Joseph-Edwards in https://github.com/libsemigroups/libsemigroups_pybind11/pull/335
+* Remove ``Union`` by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/339
+* Import file modules in ``__init__`` by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/338
+* Sync aho corasick by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/340
+* konieczny: add init mem fn by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/349
+* word-graph: fix ``follow_path`` return type by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/348
+* paths: add helpers by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/350
+* Sync ``Forest`` and its helpers with recent changes in libsemigroups_ by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/347
+* Sync presentation by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/351
+* Sync examples by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/353
+* Sync ``to<Presentation>`` upstream enhancements by @jswent in https://github.com/libsemigroups/libsemigroups_pybind11/pull/358
+* hpcombi: support ``Vect16`` + ``PTransf16`` + subclasses by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/355
+* paths: update for fixes in libsemigroups_ by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/363
+
+New Contributors
+~~~~~~~~~~~~~~~~
+
+* @jswent made their first contribution in https://github.com/libsemigroups/libsemigroups_pybind11/pull/359
+
 v1.1.0 (released 30/09/2025)
 ----------------------------
 

diff --git a/docs/source/install.rst b/docs/source/install.rst
@@ -101,10 +101,10 @@ To build ``libsemigroups_pybind11`` from a release archive:
 
 ::
 
-    $ curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.1.0.tar.gz
-    $ tar -xf libsemigroups_pybind11-1.1.0.tar.gz
-    $ rm -f libsemigroups_pybind11-1.1.0.tar.gz
-    $ cd libsemigroups_pybind11-1.1.0
+    $ curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.2.0.tar.gz
+    $ tar -xf libsemigroups_pybind11-1.2.0.tar.gz
+    $ rm -f libsemigroups_pybind11-1.2.0.tar.gz
+    $ cd libsemigroups_pybind11-1.2.0
     $ pip install .
 
 Building the documentation