thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation Biocomputing Chromatic Polynomial DNA computing Discharging Proof Techniques Four Color Conjecture Graph Isomorphism Algorithms Graph Theory Hospital, healthcare, economic history, organisation, financing, reform, hospital models Maximal Planar Graph Planar Graphs Probe Machine Protein computing RNA computing Recursive Graph Construction thema EDItEUR::K Economics, Finance, Business and Management::KN Industry and industrial studies::KNS Hospitality and service industries thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBD Medical profession thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBS Medical sociology thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues::MBX History of medicine thema EDItEUR::N History and Archaeology::NH History::NHT History: specific events and topics::NHTB Social and cultural history thema EDItEUR::U Computing and Information Technology::UK Computer hardware thema EDItEUR::U Computing and Information Technology::UY Computer science::UYD Systems analysis and design