Update index.markdown to include REDEFINED

index.markdown

@@ -303,6 +303,7 @@ SPARROWS' performance on a handful of these scenarios is demonstrated below.
 
 * [Autonomous Robust Manipulation via Optimization with Uncertainty-aware Reachability](https://roahmlab.github.io/armour/)
 * [Reachability-based Trajectory Design with Neural Implicit Safety Constraints](https://roahmlab.github.io/RDF/)
+* [Reachability-based Trajectory Design via Exact Formulation of Implicit Neural Signed Distance Functions](https://roahmlab.github.io/redefined/)
 
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