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Dracula
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 Yearling
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Will a tilting sheaf over Z which is a generator over Q be a generator modulo every prime?
Can you clarify what you mean by "variety defined over $\mathbf{Z}$"?
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Will a tilting sheaf over Z which is a generator over Q be a generator modulo every prime?
OK, no, I think you followed it fine. I was answering Sawin's implicit question.
answered
Will a tilting sheaf over Z which is a generator over Q be a generator modulo every prime?
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Infinitely many irreducible polynomials of the form f(X^2) + X mod 3?
x^i + x - 1 with i even is irreducible mod 3 for i = 2,4,6,14,30,54,364,446,638,1382,1478,2726, and ??.
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Transitivity of discriminant for flat algebras
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Order of vanishing of an integer polynomial at a point
awarded
 Enlightened
awarded
 Nice Answer
answered
Do I know what "coherent sheaf" means if I know what it means on locally Noetherian schemes?
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 Teacher
answered
What is an excellent algebraic space?