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@@ -6,11 +6,9 @@ Licensing information can be found in the `LICENSE` file.
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## Version 1.13.1 (released 27/09/2025)
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This is a minor release of the Digraphs package, containing one bugfix.
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This is a minor release of the Digraphs package, containing one bugfix:
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## What's Changed
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* In [PR #852](https://github.com/digraphs/Digraphs/pull/852), [@wilfwilson](https://github.com/wilfwilson) fixed a bug that could result in an incorrect result being given for the `AutomorphismGroup` of a digraph that was created by the `CompleteBipartiteDigraph` operation.
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* This bug was reported by [@bojankuzma000](https://github.com/bojankuzma000) in [Issue #850](https://github.com/digraphs/Digraphs/issues/850).
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In [PR #852](https://github.com/digraphs/Digraphs/pull/852), [@wilfwilson](https://github.com/wilfwilson) fixed a bug that could result in an incorrect result being given for the `AutomorphismGroup` of a digraph created by the `CompleteBipartiteDigraph` operation. This bug was reported by Bojan Kuzma ([@bojankuzma000](https://github.com/bojankuzma000)) in [Issue #850](https://github.com/digraphs/Digraphs/issues/850).
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## What's Changed
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*[@jengelh](https://github.com/jengelh) added support for version 4 of the [Edge Addition Planarity Suite][] in [PR #766](https://github.com/digraphs/Digraphs/pull/766). Version 4 is now the version that is vendored with the Digraphs package.
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*[@frankiegillis](https://github.com/frankiegillis) improved the performance of `IsTwoEdgeTransitive` in [PR #739](https://github.com/digraphs/Digraphs/pull/739), and added `Is2EdgeTransitive` as a synonym for this property.
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*[Wilf A. Wilson][] restored compatibility with GAP 4.10 in [PR #846](https://github.com/digraphs/Digraphs/pull/846).
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*[@wilfwilson](https://github.com/wilfwilson) restored compatibility with GAP 4.10 in [PR #846](https://github.com/digraphs/Digraphs/pull/846).
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## New Contributors
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* Jan Engelhardt ([@jengelh](https://github.com/jengelh)) made their first contribution in [PR #766](https://github.com/digraphs/Digraphs/pull/766).
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## Version 1.11.0 (released 28/08/2025)
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## What's Changed
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* Added `IsTwoEdgeTransitive` by [@frankiegillis](https://github.com/frankiegillis) in [PR #733](https://github.com/digraphs/Digraphs/pull/733).
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*[@frankiegillis](https://github.com/frankiegillis) added `IsTwoEdgeTransitive` in [PR #733](https://github.com/digraphs/Digraphs/pull/733).
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*[@flsmith](https://github.com/flsmith) made `RandomDigraph` more random in [PR #738](https://github.com/digraphs/Digraphs/pull/738).
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*Added`BurntPancakeGraph` and `BurntPancakeGraph` in [PR #403](https://github.com/digraphs/Digraphs/pull/403).
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*Added a new optional first argument for mutability in `CayleyDigraph` by [@james-d-mitchell](https://github.com/james-d-mitchell) in [PR #403](https://github.com/digraphs/Digraphs/pull/403).
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*Added `MinimalCyclicEdgeCut` by [@MeikeWeiss](https://github.com/MeikeWeiss) in [PR #754](https://github.com/digraphs/Digraphs/pull/754).
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*Added `DigraphAllChordlessCyclesOfMaximalLength` by [@MeikeWeiss](https://github.com/MeikeWeiss) in [PR #754](https://github.com/digraphs/Digraphs/pull/754).
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*Added `DigraphKings` and `DigraphIsKing` by [@hrj4](https://github.com/hrj4) in [PR #521](https://github.com/digraphs/Digraphs/pull/521).
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*[@james-d-mitchell](https://github.com/james-d-mitchell) added`BurntPancakeGraph` and `BurntPancakeGraph` in [PR #403](https://github.com/digraphs/Digraphs/pull/403).
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*[@james-d-mitchell](https://github.com/james-d-mitchell) added a new optional first argument for mutability in `CayleyDigraph` in [PR #403](https://github.com/digraphs/Digraphs/pull/403).
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*[@MeikeWeiss](https://github.com/MeikeWeiss) added `MinimalCyclicEdgeCut` in [PR #754](https://github.com/digraphs/Digraphs/pull/754).
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*[@MeikeWeiss](https://github.com/MeikeWeiss) added `DigraphAllChordlessCyclesOfMaximalLength` in [PR #754](https://github.com/digraphs/Digraphs/pull/754).
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*[@hrj4](https://github.com/hrj4) added `DigraphKings` and `DigraphIsKing` in [PR #521](https://github.com/digraphs/Digraphs/pull/521).
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*[@wilfwilson](https://github.com/wilfwilson) improved `ViewString` for digraphs in [PR #783](https://github.com/digraphs/Digraphs/pull/783).
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*[@EwanGilligan](https://github.com/EwanGilligan) implemented Zykov's and Christofides's algorithms and made them available as options for `ChromaticNumber` in [PR #491](https://github.com/digraphs/Digraphs/pull/491).
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*[@ChrisJefferson](https://github.com/ChrisJefferson) sped up `OnDigraphs` for a digraph and a permutation in [PR #267](https://github.com/digraphs/Digraphs/pull/267).
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*[@pramothragavan](https://github.com/pramothragavan) added dreadnaut support in [PR #651](https://github.com/digraphs/Digraphs/pull/651), along with the functions `DreadnautString`, `DigraphFromDreadnautString`, `DIMACSString`, and `DigraphFromDIMACSString`; and the variables `WholeFileEncoders` and `WholeFileDecoders` and the functions `IsWholeFileEncoder` and `IsWholeFileDecoder`.
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*[@RaiyanC](https://github.com/RaiyanC) added `DigraphMaximumFlow` in [PR #751](https://github.com/digraphs/Digraphs/pull/751).
*[@pramothragavan](https://github.com/pramothragavan) added dreadnaut support in [PR #651](https://github.com/digraphs/Digraphs/pull/651), along with the variables `WholeFileEncoders` and `WholeFileDecoders`, and the the functions:
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*`IsWholeFileEncoder`,
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*`IsWholeFileDecoder`,
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*`DreadnautString`,
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*`DigraphFromDreadnautString`,
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*`DIMACSString`, and
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*`DigraphFromDIMACSString`.
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## New Contributors
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*[@BaseMax](https://github.com/BaseMax) made their first contribution in [PR #749](https://github.com/digraphs/Digraphs/pull/749).
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*[@hrj4](https://github.com/hrj4) made their first contribution in [PR #521](https://github.com/digraphs/Digraphs/pull/521).
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*[@pramothragavan](https://github.com/pramothragavan) made their first contribution in [PR #651](https://github.com/digraphs/Digraphs/pull/651).
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*[@BlueRidingHood](https://github.com/BlueRidingHood) made their first contribution in [PR #706](https://github.com/digraphs/Digraphs/pull/706).
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*[@hrj4](https://github.com/hrj4) made their first contribution in [PR #521](https://github.com/digraphs/Digraphs/pull/521).
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*[@BaseMax](https://github.com/BaseMax) made their first contribution in [PR #749](https://github.com/digraphs/Digraphs/pull/749).
*[@wilfwilson](https://github.com/wilfwilson) fixed an bug in `ArticulationPoints` in [PR #779](https://github.com/digraphs/Digraphs/pull/779).
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*[@wilfwilson](https://github.com/wilfwilson) added an appendix to the manual that describes the DIMACS format in [PR #775](https://github.com/digraphs/Digraphs/pull/775).
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