2 problems

The Barto–Opršal–Pinsker tractability dichotomy conjecture for reducts of finitely bounded homogeneous structures
Barto–Opršal–Pinsker dichotomy conjecture. Exactly one of the following holds:
openFrom papersconstraint-satisfaction-problems infinite-domain-csp topological-algebra
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5
Stability of identities following from associativity under ultrafilter algebras
Let an identity be a formula in the language of a groupoid, and consider the algebra of ultrafilters associated with a compact left topological groupoid. Ultrafilter-stability conj…
openFrom paperstopological-algebra ultrafilters
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5

The Barto–Opršal–Pinsker tractability dichotomy conjecture for reducts of finitely bounded homogeneous structures