doubled graph
preferred label: گراف دوگانه @fa
type: Concept
broader: rotating drum problem

de Bruijn cycle
preferred label: چرخه دوبرون @fa
type: Concept
broader: rotating drum problem

enumerative combinatorics
preferred label: ترکیبیات شمارشی @fa
type: Concept
narrower: rotating drum problem

rotating drum problem
narrower: doubled graph
narrower: de Bruijn cycle
broader: enumerative combinatorics
preferred label: مسئله طبل دوار @fa
type: Concept