แนวคิดหลัก
Superstars와 Comets의 합은 NP-hard임을 입증하고, 이는 Nimbers보다 한 단계 어렵다.
สถิติ
A sum of superstars and comets is NP-hard.
Pure Set Cover is NP-complete.
Set Cover is NP-complete even with three elements in each set.
คำพูด
"The whole is greater than the sum of their parts" - Introduction
"The hardness comes from finding that value rather than describing the difficulty of performing the mathematical operation." - Intractability Proof