Equals DTIME(22p(n)) for p a polynomial.
Also known as 2-EXP.
Contains EE, and is contained in NEEXP.
See EEXP.
Equals DTIME(22O(n)) (though some authors alternatively define it as being equal to DTIME(2O(2n))).
EE = BPE if and only if EXP = BPP [IKW01].
Nondeterministic double-exponential time (i.e. NTIME(22p(n)) for p a polynomial).
Equals MIPEXP (unrelativized).