[WIP] Partial Fused Gromov-Wasserstein solver (#687)

* merge

* new dev version

* first commit partial fgw

* complete tests + solve_gromov

* complete tests + solve_gromov

* release

CONTRIBUTORS.md

@@ -41,7 +41,8 @@ The contributors to this library are:
 * [Tanguy Kerdoncuff](https://hv0nnus.github.io/) (Sampled Gromov Wasserstein)
 * [Minhui Huang](https://mhhuang95.github.io) (Projection Robust Wasserstein Distance)
 * [Nathan Cassereau](https://github.com/ncassereau-idris) (Backends)
-* [Cédric Vincent-Cuaz](https://github.com/cedricvincentcuaz) (Graph Dictionary Learning, FGW, semi-relaxed FGW, quantized FGW)
+* [Cédric Vincent-Cuaz](https://github.com/cedricvincentcuaz) (Graph Dictionary Learning, FGW,
+  semi-relaxed FGW, quantized FGW, partial FGW)
 * [Eloi Tanguy](https://github.com/eloitanguy) (Generalized Wasserstein
   Barycenters, GMMOT)
 * [Camille Le Coz](https://www.linkedin.com/in/camille-le-coz-8593b91a1/) (EMD2 debug)

RELEASES.md

@@ -2,9 +2,11 @@
 
 ## 0.9.6dev
 
+#### New features
+- Implement CG solvers for partial FGW (PR #687)
+
 #### Closed issues
-- Fixed `ot.mapping` solvers which depended on deprecated `cvxpy` `ECOS` solver
-  (PR #692, Issue #668)
+- Fixed `ot.mapping` solvers which depended on deprecated `cvxpy` `ECOS` solver (PR #692, Issue #668)
 
 
 ## 0.9.5

ot/gromov/__init__.py

@@ -102,6 +102,8 @@
 from ._partial import (
     partial_gromov_wasserstein,
     partial_gromov_wasserstein2,
+    partial_fused_gromov_wasserstein,
+    partial_fused_gromov_wasserstein2,
     solve_partial_gromov_linesearch,
     entropic_partial_gromov_wasserstein,
     entropic_partial_gromov_wasserstein2,
@@ -173,6 +175,8 @@
     "fused_unbalanced_across_spaces_divergence",
     "partial_gromov_wasserstein",
     "partial_gromov_wasserstein2",
+    "partial_fused_gromov_wasserstein",
+    "partial_fused_gromov_wasserstein2",
     "solve_partial_gromov_linesearch",
     "entropic_partial_gromov_wasserstein",
     "entropic_partial_gromov_wasserstein2",