The paper defines the dual-world redirected-walking shortest path problem, proves it NP-hard, and gives a polynomial-time approximation scheme called DEWN.
k- nearest neighbors on road networks: A journey in experimentation and in- memory implementation
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On VR Spatial Query for Dual Entangled Worlds
The paper defines the dual-world redirected-walking shortest path problem, proves it NP-hard, and gives a polynomial-time approximation scheme called DEWN.