Messages

By Paul Aleksander Maugesten
Published May 31, 2018 12:00 AM

Following Mandell-May (2002) and Schwede we will consider orthogonal G-spectra and the associated stable equivariant homotopy category.

By Paul Aleksander Maugesten
Published Apr. 26, 2018 3:03 PM

I will talk about the stable model structures on sequential and symmetric motivic T-spectra. Here are my notes.

Morel-Voevodsky (1999), Jardine (2000), Hovey (2001).

By Paul Aleksander Maugesten
Published Apr. 25, 2018 10:24 AM

I will discuss motivic homotopy, motivic cohomology, and motivic sequential T-spectra.

By Paul Aleksander Maugesten
Published Apr. 16, 2018 4:14 PM

Motivic spaces are defined as Nisnevich- and A^1-localizations of simplicial presheaves on Sm/S.  We study the projective, flasque and injective model structures underlying their homotopy theory.

By Paul Aleksander Maugesten
Published Mar. 22, 2018 2:09 PM

I will discuss the stable model structures on symmetric and orthogonal spectra, and the lifted model structures on ring and module spectra.

By Paul Aleksander Maugesten
Published Mar. 21, 2018 11:03 AM

I will discuss Bousfield localization of model structures, and the stable (projective) model structure on sequential spectra.

By Paul Aleksander Maugesten
Published Mar. 8, 2018 7:43 PM

I will discuss the projective model structure for orthogonal spectra. The main references are Mandell-May-Schwede-Shipley (2001), Hovey (2001) and Hirschhorn (2003).

By Paul Aleksander Maugesten
Published Mar. 5, 2018 3:31 PM

Sabrina Pauli (sabrinp@student.matnat.uio.no) is the student representative for MAT9580 this term.

By Paul Aleksander Maugesten
Published Feb. 28, 2018 4:22 PM

I will discuss the projective model structures on sequential and symmetric spectra.  The main references are Hovey-Shipley-Smith (2000), and Hovey (2001).

By Paul Aleksander Maugesten
Published Feb. 22, 2018 10:03 AM

After discussing closed symmetric monoidal categories, I will talk about monoidal model structures, and prove the Schwede-Shipley theorem about model structures on monoids, modules or algebras in a monoidal model category.  The main reference is Schwede-Shipley (2000).

By Paul Aleksander Maugesten
Published Feb. 5, 2018 3:55 PM

After explaining Quillen's small object argument, I will discuss cofibrantly generated model structures, including the examples of topological spaces and simplicial sets.

By Paul Aleksander Maugesten
Published Jan. 31, 2018 5:37 PM

I will talk about Quillen adunction and Quillen equivalences between model categories, and the induced adjunctions and equivalences of their homotopy categories.  Thereafter I will talk about ordinals, cardinals and small objects, leading up to Quillen's small object argument.  References include the books of Hovey (1999), Hirschhorn (2003) and May-Ponto (2012).

By Paul Aleksander Maugesten
Published Jan. 24, 2018 2:35 PM

Note the modified time and place.

I will say a little more about the Dwyer-Kan simplicial localization, then turn to model structures.  Reference include Dwyer-Spalinski (1995), and Hovey (1999), in additional to the classics by Quillen (1967/69) and Strøm (1972).

By Paul Aleksander Maugesten
Published Jan. 17, 2018 10:39 AM

I will start with a discussion of some of the problems that model category theory are intended to solve.  This involves the homotopy categories of topological spaces, localization and group completion, simplicial methods and simplicial localizations.  References include Gabriel-Zisman (1967), Dwyer-Kan (JPAA 1980) and Fiedorowicz (1984), and are available in the documents folder for MAT9580.  Here are my rough notes.

By Paul Aleksander Maugesten
Published Dec. 20, 2017 9:54 AM

Possible sources:

  •     Hovey, Mark    Model categories.    Mathematical Surveys and Monographs, 63. American Mathematical Society, Providence, RI, 1999. xii+209 pp.
  •     Schwede, Stefan; Shipley, Brooke E.    Algebras and modules in monoidal model categories.    Proc. London Math. Soc. (3) 80 (2000), no. 2, 491-511.
  •     Hovey, Mark; Shipley, Brooke; Smith, Jeff    Symmetric spectra.    J. Amer. Math. Soc. 13 (2000), no. 1, 149-208.
  •    Jardine, J. F.     Motivic symmetric spectra.     Doc. Math. 5 (2000), 445-5 52.
  •     Hovey, Mark    Spectra and symmetric spectra in general model categories.    J. Pure Appl. Algebra 165 (2001), no. 1, 63-127.
  •     Mandell, M. A.; May, J. P.; Schwede...