31. August 
Algebra lunch and planning session

7. September 
Jan Christophersen (Oslo)
Ekvivelære trianguliseringer av
torusen og abelske flater I

14. September 
Kristian Ranestad (Oslo)
En geometrisk karakterisering av Hankelunderrom
Sammendrag:
Hvis r < d så definerer radene i (r x d)matrisa (a_i,j) der a_i,j=a_ij et
underrom av P^(d1). Ved hjelp av apolaritet og projeksjoner av en
rasjonal normal kurve vil jeg karakterisere disse underrommene.

21. September 
Lunch

28. September 
Lunch
The Geometry seminar

5. October 
Jan Christophersen (Oslo)
Ekvivelære trianguliseringer av
torusen og abelske flater II

12. October 
Michal Kapustka (Krakow/Oslo)
Unprojections and Mukai varieties
Abstract:
Mukai varieties M_g are key varieties for the description of canonical
embeddings of curves of genus g<11. I shall present them using equations
and use this presentation to prove that the projection of a general nodal
linear section of the variety M_g is a linear section of M_{g1}. This
may be used to construct cascades of K3 surfaces, Fano and CalabiYau
threefolds, and give a description of some Moduli spaces of bundles on
them.

19. October 
Lunch

26. October 
Nelly Villamizar (Oslo)
Edwards coordinates for elliptic curves
Abstract:
Every elliptic curve over a field of characteristic different
from 2 is birationally equivalent to a curve in Edwards form
x^2+y^2=1+dx^2y^2. Some elliptic curves require a field extension for the
transformation, but in many cases the transformations are defined over the
original field. One reason for the great interest in Edwards curves is that
the Edwards addition law is strongly unified: it applies to doubling points
as well as to general addition, unlike the usual Weierstrass addition law.
Strongly unified addition formulas had previously been published but the
Edwards formulas are considerably faster. I have been studying the Edwards
form from a more geometric point of view and that is what I will present in
the talk.

2. November 
Lunch

9. November 
Lunch

12.13. November 
Nasjonalt algebramøte

16. November 
Lunch

18. November 
NB! Venue: Høgskolen i Oslo, Pilestredet 35. Time: 12.30 (lunch 11.30, 9. floor)
Uwe Nagel (Kentucky)
Results and open problems in liaison theory
Abstract:
Liaison theory originated from the idea to study a curve by relating
it to a simpler curve. Nowadays it may be considered as a
classification theory for curves, surfaces, etc. In the talk we will
introduce the basic concepts, discuss some classical and recent
results, and conclude the description of the state of the art by
describing some open problems.

23. November 
Lunch

30. November 
Lunch

7. December 
Jan Christophersen (Oslo)
Milnor fibere til sykliske kvosient singulariteter og fylte linserom

14. December  Lutefiskseminar
13.1514.15: Gregory G. Smith (Queen's University)
Tangential schemes of determinantal varieties Abstract:
The nth jet scheme of a variety encodes the nth order Taylor
expansions of functions on the variety. The jet schemes associated to
the varieties of matrices of a given rank are cut out by a relatively
simple and explicit collection of polynomials. In this talk, I give
an overview of the geometric properties of these jet schemes. I will
also describe the minimal free resolution for the coordinate ring of
some 1st jet schemes. 14.3015.15: Ulf Persson
(Chalmers) Familjer av trianglar med given inskriven och
omskriven radie. Ett specialfall av Poncelet.
19.30: Lutefisk at Rorbua, Aker Brygge.
