Constructs a flat projective morphism to a smooth curve with Cohen-Macaulay reduced fibers, smooth generic fiber, and non-constant first cohomology of the structure sheaf to answer a Kollár-Kovács question.
Hartshorne, Algebraic Geometry, Graduate Texts in Mathematics 52
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On a question of Koll\'ar and Kov\'acs
Constructs a flat projective morphism to a smooth curve with Cohen-Macaulay reduced fibers, smooth generic fiber, and non-constant first cohomology of the structure sheaf to answer a Kollár-Kovács question.