P vs NP problem
Determine whether the complexity classes P and NP are equal; equivalently, establish whether every decision problem whose solutions can be verified in polynomial time also admits a polynomial-time algorithm that constructs such solutions.
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References
Its central open question—whether P equals NP—asks whether every truth that can be verified efficiently can also be constructed.
— From Heisenberg and Schrödinger to the P vs. NP Problem
(2511.07502 - Weinstein, 10 Nov 2025) in Section 1. Introduction