Provenance and copyright holders#

Where the code of dynG comes from, who holds copyright in it, and on what basis it is published under Apache-2.0. The file headers say it per file; this page says it per source. The license decision is ADR 0002 (ADR 0002: License and credit); the approvals are logged in GOVERNANCE.md.

Basis for publishing ported code#

None of the six original research repositories carries a license, so publishing code derived from them under Apache-2.0 is a relicensing by their copyright holders. At the approval of the plan (2026-09-27) the lead maintainer recorded that:

the university’s IP office asked for the code to be made public, so IP clearance is done (decision O26);
written consent e-mails from co-authors are not needed, because the code was written by the lead maintainer (the table below), and ports may be published as soon as they pass their gates (decision A5);
the originals’ git histories are not imported (decision O22); provenance is kept by the per-file headers // Derived from <repo>@<commit>:<path> (checked by ci/provenance_check.py) and by parity/references.toml.

The original repositories#

Counts are of the commits reachable from the pinned commit (git log <commit> in the original, 2026-09-27). Every original is public under https://github.com/SMShovan/<repository>.

Repository @ pinned commit	Algorithm in dynG	Commits (first - last)	Commit identities	AI-assisted commits
MOSP-OpenMP @ c352151	`sssp` (CPU), `mosp`	59 (2023-09 - 2026-09)	S M Shovan (as “S M Shovan” and “SMShovan”): 59	31
MOSP-CUDA @ e220ee2	`sssp` (CUDA), `mosp`	35 (2025-08 - 2026-09)	S M Shovan: 34; placeholder `CUDA <user@example.com>`: 1	33
CycleEnumeration-GPU @ 0a976ad	`cycle_count`	110 (2026-05 - 2026-09)	S M Shovan: 110	35
ESCHER-GPU @ abcf9b2	hypergraph store, `triad_count`	80 (2024-06 - 2026-09)	S M Shovan (as “S M Shovan”, “SMShovan” and a university cluster account): 66; placeholder: 14	34
MOSP_ESCHER @ 4b86159	`hyper_sssp`, hypergraph store	51 (2026-04 - 2026-09)	S M Shovan (as “S M Shovan” and “S. M. Shovan”): 51	50
LabelPropagation-CUDA @ a276a3a	`label_propagation`	63 (2024-07 - 2026-09)	S M Shovan (as “S M Shovan”, “SMShovan” and a university cluster account): 56; placeholder: 7	37

Placeholder identity. 22 commits (14 in ESCHER-GPU, 7 in LabelPropagation-CUDA, 1 in MOSP-CUDA) carry the unconfigured identity CUDA <user@example.com>. The lead maintainer confirmed (2026-09-27) that they were made by the author or by an AI coding assistant working on the author’s behalf; they are credited to S M Shovan (AUTHORS.md), and the placeholder is not a person.
AI-assisted commits carry a Co-Authored-By trailer naming the AI coding assistant (the fixes of 2026 before the port). The IP office’s answer covers the code as it is.
Code written outside git. The papers list co-authors (AUTHORS.md, CITATION.cff). For TruCy / DynTruCy (CycleEnumeration-GPU), Arindam Khanda is a co-first author; whether any of the code was written by a co-author outside the recorded commits is to be confirmed by the lead maintainer. Until then, co-authors are credited in AUTHORS.md as research collaborators, not as authors of the code.
The cluster account’s e-mail address and the host names of the originals’ histories are not repeated here (the repository never records host names or personal paths).

Which dynG files derive from each original: git grep -l "Derived from <repository>@". ci/provenance_check.py fails when a library or tool source (cpp/src, cpp/include, tools) names an original’s function, class or kernel (its SYMBOLS list) without such a line. For the ESCHER CBST store the list is derived from the explicit renames of parity/escher_port/rename_map.toml (every original identifier the transplant renamed), plus the dynG names of the port’s kernels and internal free functions (*_kernel, construct_cbst, walk_chain, compact_cbst, …), so port code moved out of cpp/src/hypergraph/escher under its dynG names still needs its line; the types a caller of the store names (cbst_store, cbst_context, …) are not in the list (ci/tests/test_provenance_check.py). Test sources are outside the check’s scope (harness code names the originals’ functions to describe their traces); a test that ports an original’s scenarios carries the line by convention (for example the CBST scenario tests under cpp/tests/hypergraph/escher and cpp/tests/parity/escher).

The ESCHER CBST store (cpp/src/hypergraph/escher, M8a) is a transplant of ESCHER-GPU@abcf9b2’s store that can be regenerated from the original: parity/escher_port/transplant.py reads the pinned commit, applies the rename map parity/escher_port/rename_map.toml (every renamed identifier, original to dynG) and the listed manual hunks (manual_hunks.patch), and transplant.py --check --rev <c1> compares the result with the first port commit (ADR 0038). The later commits each apply one class of mechanical change (parity/results/M8a.md, the merge-step table).

Third-party code#

No third-party code is copied into the repository. Build-time dependencies (GoogleTest, CPM.cmake and, with CUDA, CCCL from the toolkit) are fetched or found at a pinned version and keep their own licenses. The Code of Conduct is the Contributor Covenant 3.0 (CC BY-SA 4.0; REUSE.toml, LICENSES/CC-BY-SA-4.0.txt).

If code whose copyright is held outside The dynG Authors ever has to be copied in, it goes to third_party/<name>/ with its own license text, keeps its original copyright and license notices (an extra SPDX-FileCopyrightText line or a REUSE.toml annotation, and the license in LICENSES/), gets a NOTICE line only if its license requires one, and gets a row here:

Directory	Origin (URL @ commit)	Copyright holders	License	Why it is copied
(none)