Details

Autor(en) / Beteiligte

• Duxbury, P.M.
• Granlund, L.
• Gujarathi, S.R.
• Juhas, P.
• Billinge, S.J.L.

Titel

The unassigned distance geometry problem

Ist Teil von

• Discrete Applied Mathematics, 2016-05, Vol.204 (C), p.117-132

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2016

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Studies of distance geometry problems (DGP) have focused on cases where the vertices at the ends of all or most of the given distances are known or assigned, which we call assigned distance geometry problems (aDGPs). In this contribution we consider the unassigned distance geometry problem (uDGP) where the vertices associated with a given distance are unknown, so the graph structure has to be discovered. uDGPs arises when attempting to find the atomic structure of molecules and nanoparticles using X-ray or neutron diffraction data from non-crystalline materials. Rigidity theory provides a useful foundation for both aDGPs and uDGPs, though it is restricted to generic realizations of graphs, and key results are summarized. Conditions for unique realization are discussed for aDGP and uDGP cases, build-up algorithms for both cases are described and experimental results for uDGP are presented.