2019
|
1. |
Christophersen, Jan Arthur; Kleppe, Jan Oddvar. Comparison theorems for deformation functors via invariant theory. Collectanea Mathematica 2019 ;Volum 70.(1) s. 1-32 UiO OSLOMET
Untitled
|
2018
|
2. |
Christophersen, Jan Arthur. Cotangent cohomology for Pflücker algebras. Seminar Algebraische Geometri, Freie Unvivärsitet, Berlin; 2018-11-15 - 2018-11-15 UiO
Untitled
|
|
3. |
Christophersen, Jan Arthur; Ranestad, Kristian. Geometry of Moduli. Abelsymposium 2017. Springer 2018 (ISBN 978-3-319-94880-5) 326 s. Abel Symposia(14) UiO
Untitled
|
2017
|
4. |
Christophersen, Jan Arthur; Ilten, Nathan Owen. Vanishing cotangent cohomology for Plücker algebras. Communications in Algebra 2017 ;Volum 45.(9) s. 3929-3947 UiO
Untitled
|
2016
|
5. |
Christophersen, Jan Arthur. Derivations of artinian algebras and rigidity of curve singularities. Seminar Algebraische Geometrie, Freie Unvivärsitet, Berlin; 2016-11-21 - 2016-11-21 UiO
Untitled
|
|
6. |
Christophersen, Jan Arthur; Ilten, Nathan Owen. Hilbert schemes and toric degenerations for low degree Fano threefolds. Journal für die Reine und Angewandte Mathematik 2016 ;Volum 2016.(717) s. 77-100 UiO
Untitled
|
2014
|
7. |
Christophersen, Jan Arthur. Local cohomology and higher cotangent cohomology for cones over Grassmannians. FU Berlin. Seminar Algebraische Geometrie, FU Berlin; 2014-06-30 - 2014-06-30 UiO
Untitled
|
|
8. |
Christophersen, Jan Arthur. Local cohomology of the Kähler differentials of invariant rings. Seminar Algebraische Geometrie, Freie Univärsitet Berlin; 2014-11-10 - 2014-11-10 UiO
Untitled
|
|
9. |
Christophersen, Jan Arthur; Ilten, Nathan Owen. Degenerations to unobstructed Fano Stanley-Reisner schemes. Mathematische Zeitschrift 2014 ;Volum 278.(1-2) s. 131-148 UiO
Untitled
|
2013
|
10. |
Christophersen, Jan Arthur. Comparison theorems for deformation functors. Mini workshop in algebraic geometry - FU Berlin; 2013-03-25 - 2013-03-26 UiO
Untitled
|
|
11. |
Christophersen, Jan Arthur. Simplicial complexes and projective varieties. Séminaire d'algèbre, topologie et géométrie, Univ Nice; 2013-01-24 - 2013-01-24 UiO
Untitled
|
2012
|
12. |
Christophersen, Jan Arthur. Comparison theorems for deformation functors. Oberwolfach conference - Singularities; 2012-09-23 - 2012-12-29 UiO
Untitled
|
|
13. |
Christophersen, Jan Arthur. Simplicial complexes and projective varieties. Topology and Geometry Seminar, Imperial College London; 2012-05-25 - 2012-05-25 UiO
Untitled
|
|
14. |
Christophersen, Jan Arthur. Triangulated topological manifolds and special algebraic varieties. Pure Mathematics Seminar, University of Western Australia; 2012-03-28 - 2012-03-28 UiO
Untitled
|
2011
|
15. |
Christophersen, Jan Arthur. Associahedra, deltahedra and Mukai varieties. Seminar Algebraische Geometrie - FU Berlin; 2011-10-17 - 2011-10-17 UiO
Untitled
|
|
16. |
Christophersen, Jan Arthur. Deformations of equivelar Stanley-Reisner abelian surfaces. Advances in Mathematics 2011 ;Volum 227.(2) s. 801-829 UiO
Untitled
|
|
17. |
Christophersen, Jan Arthur. On the Hilbert scheme containing Fano threefolds of low degree. Extremal Laurent polynomials and Fano varieties - Berlin; 2011-12-14 - 2011-12-16 UiO
Untitled
|
|
18. |
Christophersen, Jan Arthur. The associahedron, deltahedra and Stanley-Reisner Fano varieties. Oberseminar Algebraische-Geometrie Kaiserslautern/Saarbrücken; 2011-05-26 - 2011-05-26 UiO
Untitled
|
|
19. |
Christophersen, Jan Arthur. Triangulated topological manifolds and special algebraic varieties. Matematische Kolloquium Universität des Saarlandes; 2011-05-27 - 2011-05-27 UiO
Untitled
|
2010
|
20. |
Altmann, Klaus; Christophersen, Jan Arthur. Deforming Stanley-Reisner schemes. Mathematische Annalen 2010 ;Volum 348.(3) s. 513-537 UiO
Untitled
|
|
21. |
Christophersen, Jan Arthur. Deformasjoner av monomiale idealer. Nasjonalt algebramøte 2010; 2010-11-11 - 2010-11-12 UiO
Untitled
|
|
22. |
Christophersen, Jan Arthur. Deformation Theory. S2AM Summer School for Algorithmic Mathematics, Berlin; 2010-08-16 - 2010-08-20 UiO
Untitled
|
|
23. |
Christophersen, Jan Arthur. Deformations of monomial ideals. Forschungsseminar "Algebraische Geometrie", FU Berlin; 2010-11-22 - 2010-11-22 UiO
Untitled
|
|
24. |
Christophersen, Jan Arthur. Deformations of Stanley-Reisner abelian surfaces. Séminaire sur les singularités, Institut Mathématique de Jussieu; 2010-02-08 - 2010-02-08 UiO
Untitled
|
|
25. |
Christophersen, Jan Arthur. Forelesningsnotater MAT2500. : Ingen 2010 30 s. UiO
Untitled
|
2009
|
26. |
Christophersen, Jan Arthur. Ekvivelære trianguleringer av torusen og abelske flater. Nasjonalt algebramøte; 2009-11-12 - 2009-11-13 UiO
Untitled
|
|
27. |
Christophersen, Jan Arthur. Equivelar triangulations of tori and abelian surfaces. SFB-Seminar, Berlin; 2009-01-13 - 2009-01-13 UiO
Untitled
|
|
28. |
Christophersen, Jan Arthur. Introductory course in Deformation Theory. Workshop on Deformation Theory in Algebraic Geometry, Mainz; 2009-02-16 - 2009-02-20 UiO
Untitled
|
|
29. |
Christophersen, Jan Arthur. Milnor fibers of cyclic quotient singularities. Forschungsseminar "Algebraische Geometrie" FU Berlin; 2009-11-30 - 2009-11-30 UiO
Untitled
|
2008
|
30. |
Christophersen, Jan Arthur. Deformations of Stanley-Reisner surfaces. Deformations of Surfaces, Budapest; 2008-10-10 - 2008-10-12 UiO
Untitled
|
|
31. |
Christophersen, Jan Arthur. The minimal triangulation of the torus and abelian surfaces. Graduiertenkolleg "Methods for Discrete Structures", Berlin; 2008-05-05 - 2008-05-05 UiO
Untitled
|
|
32. |
Christophersen, Jan Arthur. Triangulations of the Torus and Abelian Surfaces. Mathematisches Kolloquium; 2008-10-30 - 2008-10-30 UiO
Untitled
|
2007
|
33. |
Christophersen, Jan Arthur. Deformation theory in algebraic geometry. Workshop on deformation theory in algebraic and differential geometry; 2007-12-13 - 2007-12-18 UiO
Untitled
|
|
34. |
Christophersen, Jan Arthur. Deformations of a Stanley-Reisner abelian surface. Seminari di Geometria; 2007-12-06 - 2007-12-06 UiO
Untitled
|
2006
|
35. |
Christophersen, Jan Arthur. Deformation theory, cotangent complexes and Massey products. Seminar Algebraische Geometrie, FU Berlin; 2006-07-21 - 2006-07-21 UiO
Untitled
|
|
36. |
Christophersen, Jan Arthur. Deformations of a degenerate abelian surface in P^6. INTERNATIONAL RESEARCH TRAINING GROUP ARITHMETIC AND GEOMETRY; 2006-06-20 - 2006-06-20 UiO
Untitled
|
|
37. |
Christophersen, Jan Arthur. Deformations of a degenerate abelian surface in P6. Oberseminar Algebraische Geometrie; 2006-07-05 - 2006-07-05 UiO
Untitled
|
|
38. |
Christophersen, Jan Arthur. Deformations of a Stanley-Reisner abelian surface and a Calabi-Yau 3-fold with Euler number 6. Singularities, Oberwolfach; 2006-09-11 - 2006-09-15 UiO
Untitled
|
2004
|
39. |
Altmann, Klaus; Christophersen, Jan Arthur. Cotangent cohomology of Stanley-Reisner rings. Manuscripta mathematica 2004 ;Volum 115. s. 361-378 UiO
Untitled
|
2001
|
40. |
Christophersen, Jan Arthur; Gustavsen, Trond Stølen. On infinitesimal deformations and obstructions for rational surface singularities. Journal of Algebraic Geometry 2001 ;Volum 10.(1) s. 179-198 UiO
Untitled
|
2000
|
41. |
Christophersen, Jan Arthur. Deforming Stanley-Reisner rings. New Developments in Singularity Theory; 2000-01-01 UiO
Untitled
|
|
42. |
Christophersen, Jan Arthur. Symmetri og materiens struktur - fra antikken til kvantefysikken. ; 2000 UiO
Untitled
|
1994
|
43. |
Behnke, Kurt; Christophersen, Jan Arthur. M-resolutions and deformations of quotient singularities. American Journal of Mathematics 1994 ;Volum 116. s. 881-903 UiO
Untitled
|
1993
|
44. |
Behnke, Kurt; Christophersen, Jan Arthur. Hypersurface sections and obstructions (minimal elliptic singularities). Transactions of the American Mathematical Society 1993 ;Volum 335. s. 175-193 UiO
Untitled
|
1991
|
45. |
Behnke, Kurt; Christophersen, Jan Arthur. Hypersurface sections and obstructions (rational surface singularities). Compositio Mathematica 1991 ;Volum 77. s. 233-268 UiO
Untitled
|
|
46. |
Christophersen, Jan Arthur. On the components and discriminant of the versal base space of cyclic quotient singularities. I: Singularity Theory and its Applications, Warwick 1989 Part 1. Springer 1991 s. 81-92 UiO
Untitled
|
1990
|
47. |
Christophersen, Jan Arthur. Obstructions for rational singularities and deformations of cyclic quotients. Universitetet i Oslo 1990 -1 s. UiO
Untitled
|
1987
|
48. |
Christophersen, Jan Arthur. Monomial curves and obstructions on cyclic quotient singularities. I: Singularities, Representation of Algebras, and Vector Bundles, Proc., Lambrecht 1985. Springer 1987 s. 117-133 UiO
Untitled
|