Geoopt

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New Features
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* Add data generator for hyperbolic manifold (192)
* add geoopt.layers.Distance2StereographicHyperplanes

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Maintainance
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* Upgrade to pytorch 1.10.2 and 1.11.0
* fix deepcopy bug (189)

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New Features
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* new Symmetric Positive Definite manifold (153)
* new Siegel manifolds: Upper half model and Bounded domain model, with support for Riemannian and Finsler metrics (179)

Maintainance
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* create pull request templates (154)
* update tests for pytorch 1.9.0

Bug Fixes
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* fix step increments in optimizers (165)

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New Features
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* Riemannian Line Search (140)
* Per group stabilization (149)

Maintenance
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* Fix API warnings (raised in 148)

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New Features
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* BirkhoffPolytope (125)
* Lorenz Manifold (121)
* :math:`kappa`-Stereographic model (126)
* Sparse optimizers (130)

Maintenance
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* Tests for pytorch>=1.4, cpuonly (133)

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Bug Fixes
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* Fix scaling issues with random methods
* Fix poincare methods ``cosub`` and ``norm`` that were working not properly
* Fix Sphere distance for small values