EntityQ1764144· pop 15· linked from 58 articlesSteiner tree problemSign in to saveclass of problems in combinatorial mathematicsConnectionstime complexityEntityElsevierEntityNP-hardEntityCarl Friedrich GaussEntitytriangleEntityInternational Standard Book NumberEntitynatural numberEntitypointEntitydigital object identifierEntityInternational Standard Serial NumberEntityplaneEntitycombinatoricsEntityelectrical circuitEntityequilateral triangleEntityline segmentEntityOCLC, Inc.EntityQ180686EntitygraphEntityJSTOREntitymetric spaceEntityCategoriesComputational problems in graph theoryGeometric algorithmsGeometric graphsNP-complete problemsTrees (graph theory)