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Showing results 1-50 of 59 << Previous 1 2    Next >>

2020
1 Ottem, John Christian.
Nef cycles on some hyperkähler fourfolds. arXiv.org 2020
UiO Untitled
 
2 Ottem, John Christian; Benoist, Olivier.
Failure of the integral Hodge conjecture for threefolds of Kodaira dimension zero. Commentarii Mathematici Helvetici 2020 ;Volume 95. p. 27-35
UiO Untitled
 
3 Ottem, John Christian; Gounelas, Frank.
Remarks on the positivity of the cotangent bundle of a K3 surface. Épijournal de Géométrie Algébrique (EPIGA) 2020 ;Volume 4.(8)
UiO Untitled
 
4 Ottem, John Christian; Suzuki, Fumiaki.
A pencil of Enriques surfaces with non-algebraic integral Hodge classes. Mathematische Annalen 2020 ;Volume 377. p. 183-197
UiO Untitled
 
2019
5 Mongardi, Giovanni; Ottem, John Christian.
Curve classes on irreducible holomorphic symplectic varieties. Communications in Contemporary Mathematics 2019
UiO Untitled
 
6 Mongardi, Giovanni; Ottem, John Christian.
Curve classes on irreducible holomorphic symplectic varieties. arXiv.org 2019
UiO Untitled
 
7 Ottem, John Christian.
A counterexample to the birational Torelli problem. College de France; 2019-06-09 - 2019-06-09
UiO Untitled
 
8 Ottem, John Christian.
A pencil of Enriques surfaces with non-algebraic integral Hodge classes. Workshop on algebraic geometry; 2019-07-26 - 2019-07-26
UiO Untitled
 
9 Ottem, John Christian.
A pencil of Enriques surfaces with non-algebraic integral Hodge classes. Geometry of algebraic varieties; 2019-09-28 - 2019-10-04
UiO Untitled
 
10 Ottem, John Christian.
Counterexamples to the integral Hodge conjecture. Workshop on birational geometry; 2019-03-26 - 2019-03-26
UiO Untitled
 
11 Ottem, John Christian.
Counterexamples to the integral Hodge conjecture. MSRI algebraic geometry seminar; 2019-02-18 - 2019-02-18
UiO Untitled
 
12 Ottem, John Christian.
Deformations of hypersurfaces. Positivity and vanishing theorems; 2019-06-05 - 2019-06-05
UiO Untitled
 
13 Ottem, John Christian; Schreieder, Stefan.
On deformations of quintic and septic hypersurfaces. Journal des Mathématiques Pures et Appliquées 2019 ;Volume 135.
UiO Untitled
 
14 Ottem, John Christian; Suzuki, Fumiaki.
A pencil of Enriques surfaces with non-algebraic integral Hodge classes. arXiv.org 2019
UiO Untitled
 
2018
15 Lehmann, Brian; Ottem, John Christian.
Positivity of the diagonal. Advances in Mathematics 2018 ;Volume 335. p. 664-695
UiO Untitled
 
16 Ottem, John Christian.
Failure of the Integral Hodge conjecture for 3-folds. ICMS algebraic geometry conference; 2018-12-05 - 2018-12-05
UiO Untitled
 
17 Ottem, John Christian.
Integral hodge conjecture for holomorphic symplectic varieties. Workshop of cubic hypersurfaces; 2018-08-22 - 2018-08-22
UiO Untitled
 
18 Ottem, John Christian.
Integral Hodge conjecture for threefolds. Munich algebraic geometry seminar; 2018-07-07 - 2018-07-07
UiO Untitled
 
19 Ottem, John Christian.
Integral Hodge conjecture for threefolds. Tropical geometry and amoebas; 2018-04-14 - 2018-04-14
UiO Untitled
 
20 Ottem, John Christian.
Positivity of the higher codimension cycles. Positivity in algebraic geometry; 2018-06-10 - 2018-06-10
UiO Untitled
 
21 Ottem, John Christian.
The birational Torelli problem for Calabi-Yau 3-folds. Seminar Algebraic Geometry (SAG); 2018-01-18 - 2018-01-18
UiO Untitled
 
22 Ottem, John Christian.
The integral Hodge conjecture for threefolds. Workshop on algebraic geometry; 2018-05-13 - 2018-05-13
UiO Untitled
 
23 Ottem, John Christian; Benoist, Olivier.
Failure of the integral Hodge conjecture for threefolds of Kodaira dimension zero. arXiv.org 2018
UiO Untitled
 
24 Ottem, John Christian; Gounelas, Frank.
Remarks on the positivity of the cotangent bundle of a K3 surface. arXiv.org 2018
UiO Untitled
 
25 Ottem, John Christian; Rennemo, Jørgen Vold.
A counterexample to the birational Torelli problem for Calabi-Yau 3-folds. Journal of the London Mathematical Society 2018 ;Volume 97.(3) p. 427-440
UiO Untitled
 
26 Ottem, John Christian; Schreieder, Stefan.
On deformations of quintic and septic hypersurfaces. arXiv.org 2018
UiO Untitled
 
2017
27 Ottem, John Christian.
A counterexample to the birational Torelli problem for Calabi Yau threefolds. Workshop on Periods and Ricci flat manifolds; 2017-09-22 - 2017-09-22
UiO Untitled
 
28 Ottem, John Christian.
A counterexample to the birational Torelli problem for Calabi-Yau threefolds. Geometry, Physics, and Representation Theory Seminar.; 2017-11-09 - 2017-11-09
UiO Untitled
 
29 Ottem, John Christian.
Nef cycles of higher codimension. Columbia algebraic geometry seminar; 2017-11-03 - 2017-11-03
UiO Untitled
 
30 Ottem, John Christian.
Nef cycles on some hyperkahler fourfolds. UGA algebra seminar; 2017-02-20 - 2017-02-20
UiO Untitled
 
31 Ottem, John Christian.
Nef cycles on some hyperkahler fourfolds. ETH algebraic geometry seminar; 2017-12-13 - 2017-12-15
UiO Untitled
 
32 Ottem, John Christian.
Nef cycles on some hyperkahler manifolds. UCLA algebra seminar; 2017-02-17 - 2017-02-17
UiO Untitled
 
33 Ottem, John Christian.
Nef cycles on some hyperkahler manifolds. Newton-Okounkov Bodies, Test Configurations, and Diophantine Geometry (17w5046); 2017-02-05 - 2017-02-10
UiO Untitled
 
34 Ottem, John Christian.
Positivity of the diagonal. Humboldt Algebraic Geometry Seminar; 2017-07-05 - 2017-07-05
UiO Untitled
 
35 Ottem, John Christian.
Positivity of the diagonal. Positivity in algebraic and complex geometry; 2017-04-24 - 2017-04-28
UiO Untitled
 
36 Ottem, John Christian.
Positivity of the diagonal. Mini-Workshop: Positivity in Higher-dimensional Geometry: Higher-codimensional Cycles and Newton-Okounkov Bodies; 2017-09-17 - 2017-09-23
UiO Untitled
 
37 Ottem, John Christian.
Semiample line bundles in positive characteristic. UiO Algebraseminar; 2017-03-16 - 2017-03-16
UiO Untitled
 
38 Ottem, John Christian.
The Birational Torelli problem for Calabi-Yau 3-folds. Periods and Ricci flat manifolds; 2017-09-11 - 2017-09-15
UiO Untitled
 
2016
39 Coskun, Izzet; Lesieutre, John; Ottem, John Christian.
Effective cones of cycles on blowups of projective space. Algebra & Number Theory 2016 ;Volume 10.(9) p. 1983-2014
UiO Untitled
 
40 Lesieutre, John; Ottem, John Christian.
Curves disjoint from a nef divisor. The Michigan mathematical journal 2016 ;Volume 65.(2) p. 321-332
UiO Untitled
 
41 Ottem, John Christian.
Effective and nef cycles in higher codimension. Nordic Congress of Mathematicians; 2016-03-15 - 2016-03-18
UiO Untitled
 
42 Ottem, John Christian.
Effective cones of cycles on blow-ups of projective space. Belgian-Dutch Algebraic Geometry Seminar; 2016-04-22 - 2016-04-22
UiO Untitled
 
43 Ottem, John Christian.
Effective cones of cycles on blow-ups of projective space. Algebraic Geometry – Satellite Conference of 7ECM; 2016-07-13 - 2016-07-16
UiO Untitled
 
44 Ottem, John Christian.
Effective cycles of higher codimension. UiO Algebraseminar; 2016-11-24 - 2016-11-24
UiO Untitled
 
45 Ottem, John Christian.
Effective cycles on blow-ups of projective space. British Algebraic Geometry meeting (BrAG); 2016-05-13 - 2016-05-15
UiO Untitled
 
46 Ottem, John Christian.
Higher codimension cycles. Workshop on higher codimension cycles; 2016-03-11 - 2016-03-13
UiO Untitled
 
47 Ottem, John Christian.
K3 surfaces. Algebraseminar; 2016-01-14 - 2016-01-14
UiO Untitled
 
48 Ottem, John Christian.
Moduli of K3s via Global Torelli. Algebraseminar; 2016-05-26 - 2016-05-26
UiO Untitled
 
49 Ottem, John Christian.
Nef cycles on hyperkahler manifolds. Positivity of cycles; 2016-07-30
UiO Untitled
 
50 Ottem, John Christian.
On subvarieties with ample normal bundle. Journal of the European Mathematical Society (Print) 2016 ;Volume 18.(11) p. 2459-2468
UiO Untitled
 
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