Lectures
Some mathematical lectures

K_4(Z) = 0
Paris (July 1994).

Kohomologi av knuterom, etter Vassiliev
Oslo (October 1994).

Vassilievs spektralfølge
Oslo (October 1994).

The SeibergWitten moduli space
Oslo (November 1995).

Fixed points of topological Hochschild homology and
Ktheory of the twoadic integers
Stanford (January 1996).

Notes on topological cyclic homology and the cyclotomic trace map
Chicago (April 1996).

Kjerneregelen i funktorkalkulus
Oslo (February 1997).

Ekvivariant stabil homotopiteori
Oslo (April 1997).

Algebraic Ktheory and stable smooth pseudoisotopy of discs
Sheffield (May 1997).

Homology and cohomology operations
Oslo (August 1997).

Gruppehomologi
Oslo (April 1998).

Unstable modules and Sullivan's conjecture
Oslo (May 1998).

Cohomology of the smooth Whitehead spectrum
Oberwolfach (September 1998).

On trace maps
Oslo (October 1998).

Algebraic Ktheory of symmetric monoidal Gammaspace categories with weak
equivalences
Oslo (October 1998).

Topological cyclic homology of Salgebras
Oslo (November 1998).

Tworegular number fields and algebraic Ktheory
Oslo (March 1999).

Twoprimary algebraic Ktheory of pointed spaces
Swansea (April 1999).

On the image of Milnor's K_4 in Quillen's K_4 for number fields
(PDF)
Oslo (May 1999).

Higher fixed points of topological Hochschild homology of the integers
Oslo (June 1999).

The stable parametrized hcobordism theorem
Oslo (October 1999).

Algebraic Ktheory of finitely presented spectra
Oberwolfach (September 2000).

Topological cyclic homology of Salgebras
Oslo (April 2001).

Twoprimary algebraic Ktheory of pointed spaces
Cornell (May 2001).

Elliptic cohomology and algebraic Ktheory of 2vector spaces
Isle of Skye (June 2001).

Galois extensions of ``brave new rings''
Abel Bicentennial Conference, Oslo (June 2002).

Waldhausen's stable parametrized hcobordism theorem
BCAT 2002, Barcelona (July 2002).

Topologisk Kteori og Bott periodisitet
Oslo (May 2003).

Automorphisms of spheres, number fields, motives and spectra
Oslo (June 2005).

Motivic truncation and arithmetic duality for some structured ring
spectra
Fourth NRW Topology Meeting, Wuppertal (October 2005).

Algebraic Ktheory of the fraction field of topological Ktheory
Schloß Ringberg proposal (November 2005).

Smooth symmetries of manifolds and arithmetic of the sphere spectrum
Bonn colloquium (November 2005).

On the stable parametrized hcobordism theorem
(DVI)
Bonn lectures (January/February 2006).

Mahowald's infinite family
Bonn AG (February 2006).

Algebraic Ktheory and the chromatic filtration
Bonn seminar (March 20th 2006, in preparation).

Arithmetic of some brave new rings
Bonn seminar (March 29th 2006).

Algebraic Ktheory and the chromatic filtration
Muenster Symposion (June 8th 2006, in preparation).

THH and TAQ
Oslo (fall 2006).

The fraction field of topological Ktheory
Banff poster (March 11th 2008).

Topological logarithmic structures
Banff talk (March 13th 2008).

Topological Hochschild homology of topological modular forms
(PS)
Nordic Topology Conference, NTNU (November 28th 2008)

Connective structures on gerbes and twovector bundles
Oslo seminar talk (March 6th 2009).

Postnikov towers and kinvariants for Smodules, Salgebras and
commutative Salgebras
Oslo seminar talk (May 15th 2009).

Topological logarithmic structures
25th Nordic and 1st BritishNordic Congress of Mathematicians,
Oslo (June 9th 2009).

Logarithmic THH and TC
pAdic Geometry and Homotopy Theory, Loen (August 6th 2009).

Motivic complexes from the stable rank filtration
Nordic Topology Symposium, Bergen (June 10th 2010).

Introduction to redshift
Oberwolfach (September 2011).

Notes on the Adams spectral sequence
Oslo (January to May 2012).

Chromatic redshift
(slides)
(video)
MSRI, Introductory Workshop: Algebraic Topology (January 28th 2014).

Algebraic Ktheory of strict ring spectra
(slides)
(video)
Seoul ICM 2014 (August 18th 2014).

Towards a motivic Segal conjecture
(part 2)
(part 3)
(part 4)
(part 5)
Oslo (SeptemberOctober 2014).
 Algebraic Ktheory of group rings
and topological cyclic homology
(slides)
Nordic Topology Meeting, NTNU (November 27th 2014).
 The weight and rank filtrations
Oslo (October 21st and 28th 2016).
 The DavisMahowald spectral sequence
Nils Baas 70, NTNU (December 1st 2016).
 Cubical and cosimplicial descent
Moduli and Traces, Copenhagen (April 21st 2017).
 Topological modular forms  I
Oslo (October 25th 2017).
Some popularized lectures
John Rognes / October 25th 2017