Set of decision problems
"Polynomial space" redirects here. For spaces of polynomials, see
Polynomial ring.
Inclusions of complexity classes including P, NP, co-NP, BPP, P/poly, PH, and PSPACE
Unsolved problem in computer science:
In computational complexity theory, PSPACE is the set of all decision problems that can be solved by a Turing machine using a polynomial amount of space.