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Combinatorial invariant
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Classroom Contents
Rationality for Threefolds Over Non-Closed Fields
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- 1 Intro
- 2 The example
- 3 A classical construction
- 4 And the converse?
- 5 Preparing the pencil
- 6 Combinatorial invariant
- 7 Topological types
- 8 The main characters
- 9 The key diagram
- 10 The argument
- 11 A motivating question
- 12 Extension to nonclosed fields
- 13 Description of addition
- 14 Rationality criterion
- 15 Fano threefolds of degree 18
- 16 Punchline
- 17 Further examples and questions
