Yas Marina Circuit (structural contractor), as well as specialised subcontractors like Voltas (MEP), PKE-Siemens (MEP), Able-Middle East (earthworks), Hamilton International (interior) and Bau Bickhardt (track) to name a few. The circuit was constructed with a permanent lighting system provided by Musco Lighting, similar to that also installed at the Losail Circuit in Qatar. Yas Marina Circuit is the largest permanent sports venue lighting project in the world; previously that title was held by Losail. The surface of the track is made of graywacke aggregate, shipped to Abu Dhabi from a Bayston Hill quarry in Shropshire, England. The surface material is highly acclaimed by
Boolean circuit "m" nodes which are labeled as the outputs. The edges must also have some ordering, to distinguish between different arguments to the same Boolean function. As a special case, a propositional formula or Boolean expression is a Boolean circuit with a single output node in which every other node has fan-out of 1. Thus, a Boolean circuit can be regarded as a generalization that allows shared subformulas and multiple outputs. A common basis for Boolean circuits is the set {AND, OR, NOT}, from which all other Boolean functions can be constructed. The Circuit Value Problem, the problem of computing the