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# Questions

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### Is singular cohomology representable by a (Voevodsky’s) motivic complex?

oct 18 10 at 20:22 Mikhail Bondarko 5,8761421

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### For a morphism f from a regular scheme, should there exist an open subscheme U of the target such that fibre of f at each point of U is regular.

aug 25 10 at 14:37 David Speyer 55.1k3102236

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### Can one extend a morphism of commutative triangles to a morphism of octahedral diagrams?

sep 17 10 at 10:29 Matthias Künzer 49347

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### Do all the main properties of constructible and perverse sheaves (in an ‘arithmetic’ situation) follow from results of Gabber?

mar 11 11 at 17:55 Mikhail Bondarko 5,8761421

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### Are Tate twists of t-positive motives positive with respect to the Voevodsky’s homotopy t-structure?

jul 26 11 at 23:17 Mikhail Bondarko 5,8761421

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### The vanishing of non-connective K-theory in negative degrees

sep 1 11 at 20:49 Denis-Charles Cisinski 4,9081120

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### Functoriality properties of the perverse $t$-structure for torsion (constructible complexes of) sheaves

sep 23 11 at 15:55 Alex 1,32466

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### Is the pre-image of a regular subscheme with respect to a universal homeomorphism of regular schemes regular?

mar 20 11 at 21:39 Karl Schwede 11.4k11435

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### If one wants to work with $Q_l$-adic sheaves, should the scheme be of finite type over a 1-dimensional one?

feb 4 11 at 17:45 Alex 1,32466

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