This package includes the following external libraries:

Geodesic (https://github.com/mojocorp/geodesic)
License: MIT
Copyright (c) 2008 Danil Kirsanov
Pinned upstream commit: 7b08bfb03c444819a31f216cb1e0a3fb9528f806
The license is retained in inst/licenses/Geodesic-MIT.txt. The six headers
under src/vendor/geodesic retain upstream notices. dgraphs adaptations add
owned interval allocations, resource/interrupt hooks, exception-based invariant
checks, silent diagnostics and typed interval copies. See that directory's
README.md for the source and modification record.

The quadform_geodesics R and C++ source units were developed in geosmooth
by Pawel Gajer's project and are distributed here under the package's MIT
license with the copyright holder's authorization (2026-09-11). This does
not change the licenses of earlier geosmooth distributions or the external
libraries listed below.

ANN - Approximate Nearest Neighbor Library
(https://www.cs.umd.edu/~mount/ANN/)
License: LGPL-2.1-or-later
Copyright (c) 1997-2010 University of Maryland, Sunil Arya, and David M. Mount
The upstream copyright and license notice is included in
inst/licenses/ANN-Copyright-Notice.txt.
dgraphs modifies ANN's point allocation and error handler (2026-09-03):
allocation is exception-safe and errors throw C++ exceptions rather than
returning silently or terminating the process. These modifications retain
ANN's LGPL-2.1-or-later license.

Spectra (https://spectralib.org/)
License: MPL-2.0
Copyright (c) 2016-2024 Yixuan Qiu and contributors
The included source files retain their MPL-2.0 notices and link to the license
text at https://mozilla.org/MPL/2.0/.

Individual Spectra linear-algebra headers also retain copyright notices for
Gael Guennebaud and Jitse Niesen. Eigensolver headers contributed by the
Netherlands eScience Center retain that organization's copyright notices.

The Spectra contribution inst/include/Spectra/contrib/LOBPCGSolver.h is
Copyright Anna Araslanova and Yixuan Qiu and is distributed under the MIT
license stated in that source file.

The reusable synthetic geometry and sampling R source units, Geometry Lab
application, and maintained quadratic-surface reference tools were developed
in Pawel Gajer's geosmooth project and migrated on 2026-09-11. Distribution of
project-owned material here is under the package's MIT license under the
recorded copyright-holder authorization, to the extent the holder has the
necessary rights. This does not relicense earlier geosmooth distributions or
third-party material. Existing third-party notices remain applicable.

Graph Reconstruction Explorer
The application sources and stylesheet under inst/shiny/graph-explorer
were moved from dggraphui on 2026-09-15. They retain their original
GPL (>= 3) license; see that component's LICENSE. The original author is
Pawel Gajer. No third-party notices have been removed.

Optional internal IAN backend (inst/ian/backend): IAN by Luciano Dyballa
(BSD-3-Clause), NumPy-derived ordering/arithmetic (BSD-3-Clause), Clarabel.cpp
(Apache-2.0), Clarabel.rs 0.11.1 (Apache-2.0), nlohmann JSON (MIT). Full upstream
notices are retained in that directory and JSON header. The pinned source and
adapter changes are recorded in backend/provenance.json. The optional build
uses additional Cargo dependencies with notices in their downloaded crates;
this source package distributes neither those crates nor a compiled module.