Negative answers to some positivity questions
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 2014.
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| Format: | Thesis |
| Sprog: | eng |
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Massachusetts Institute of Technology
2014
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| Online adgang: | http://hdl.handle.net/1721.1/90187 |
| _version_ | 1826197402920419328 |
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| author | Lesieutre, John |
| author2 | James McKernan. |
| author_facet | James McKernan. Lesieutre, John |
| author_sort | Lesieutre, John |
| collection | MIT |
| description | Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 2014. |
| first_indexed | 2024-09-23T10:47:09Z |
| format | Thesis |
| id | mit-1721.1/90187 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T10:47:09Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/901872019-04-12T13:51:25Z Negative answers to some positivity questions Lesieutre, John James McKernan. Massachusetts Institute of Technology. Department of Mathematics. Massachusetts Institute of Technology. Department of Mathematics. Mathematics. Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 2014. 47 Cataloged from PDF version of thesis. Includes bibliographical references (pages 61-64). We construct counterexamples to a number of questions related to positivity properties of line bundles on algebraic varieties. The examples are based on studying the geometry of varieties that admit pseudo automorphisms of positive entropy, and in particular on the action of standard Cremona transformations on blow-ups of projective space at configurations of points. The main examples include the following: nefness is not an open condition in families; the diminished base locus of a divisor is not always a closed set; Zariski decompositions do not necessarily exist in dimension three; asymptotic multiplicity invariants are not always finite in the relative setting; and the number of Fourier- Mukai partners of a variety can be infinite. by John Lesieutre. Ph. D. 2014-09-19T21:44:55Z 2014-09-19T21:44:55Z 2014 2014 Thesis http://hdl.handle.net/1721.1/90187 890211399 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 64 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mathematics. Lesieutre, John Negative answers to some positivity questions |
| title | Negative answers to some positivity questions |
| title_full | Negative answers to some positivity questions |
| title_fullStr | Negative answers to some positivity questions |
| title_full_unstemmed | Negative answers to some positivity questions |
| title_short | Negative answers to some positivity questions |
| title_sort | negative answers to some positivity questions |
| topic | Mathematics. |
| url | http://hdl.handle.net/1721.1/90187 |
| work_keys_str_mv | AT lesieutrejohn negativeanswerstosomepositivityquestions |