Forskningsresultater

Publiserte artikler

Generators of matrix algebras in dimension 2 and 3. (with H. Aslaksen)  Linear Algebra and its Applications, Volume 430, No. 1(2009), pp. 1-6 (pdf)

André-Quillen cohomology of monoid algebras (with Klaus Altmann)  J. of Alg. 210 (1998) pp. 708-718 (pdf)

Products in the Decomposition of Hochschild Cohomology.  Comm. in Alg. 22(5), (1994) pp. 1899-1911 (pdf)

Cohomology of monoid algebras. J. Alg 161(1) (1993) pp.102-128 (pdf)

Base change, transitivity and Künneth formulas for the Quillen decomposition of Hochschild homology. (with Chr. Kassel)  Math. Scand. 70 (1992) pp. 186-192 (pdf)

Cohomology of monoid algebras,  Thesis, Univ. of Oslo (1989)

Betti numbers of monoid algebras. Application to 2-dimensional torus embeddings. (with O.A.Laudal) Math. Scand. 56 (1985) pp. 145-162 (pdf)

Manuskripter/Preprints

Cohomology of projective Systems on ranked Posets. Manuskript, 5. oktober 2015. (pdf)

Finite dimensional Representations of the projective Modular Group. math.AG/0610587 (pdf)

Noncommutative plane geometry (with O.A.Laudal and Søren Jøndrup)  math.AG/0405350 (pdf)

Infinitesimal incidence in noncommutative algebraic geometry, with applications to noncommutative conic sections.  Preprint series, Matematisk institutt, Univ. of Oslo, No. 28-2000 (pdf)

Cohomology of numerical monoids generated by three elements.  Preprint series, Matematisk institutt, Univ. of Oslo, No. 9-2000 (pdf)

Algebra cohomology of commutative semi-groups.  Preprint, Mat. Inst. Univ. of Oslo, No 1. (1989)

Faglige foredrag

Inverse limits of projective systems. Nasjonalt algebramøte, 6 november 2015. (pdf)

Geometri på ikke-kommutative algebraer. Ski og matematikk, Rondablikk, 4. januar 2012. (pdf)