Erik Christensen

Erik Christensen

Associate professor emeritus

ORCID: 0000-0003-1754-0778

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  1. Published

    A Remark on the Similarity and Perturbation Problems

    Cameron, J., Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. & Wiggins, A. D., 2013, In: Mathematical Reports of the Academy of Science. 35, 2

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    A cohomological characterization of approximately finite dimension von Neumann algebras

    Christensen, Erik, 1997, Operator Algebras and quantum field theory. Rom: International Press, p. 323-328

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  3. Published

    A survey of completely bounded operators

    Christensen, Erik & Sinclair, A. M., Sep 1989, In: Bulletin of the London Mathematical Society. 21, 5, p. 417-448 32 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  4. Published

    Bilinear forms, Schur multipliers, complete boundedness and duality

    Christensen, Erik, 2023, In: Mathematica Scandinavica. 129, 3, p. 543-569

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    C*-algebras nearly contained in a type I C*-algebra

    Christensen, Erik, Sinclair, A. M., White, S. A. & Smith, R. R., Jan 2013, In: Canadian Journal of Mathematics. 65, p. 52-65 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Close operator algebras

    Christensen, Erik, 1988, In: NATO ASI Series C Mathematical and Physical Sciences - Advanced Study Institute. 247 , p. 537 - 556 20 p.

    Research output: Contribution to journal › Conference article › Research › peer-review

  7. Published

    Cohomology of operator algebras and quantum dynamical semigroups.

    Christensen, Erik & Evans , D. E., 1979, In: Journal of the London Mathematical Society. 20, 2, p. 358-368 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Commutants of nest algebras modulo the compact operators

    Christensen, Erik & Peligrad, C., Feb 1980, In: Inventiones Mathematicae. 56, 1, p. 113-116 4 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Commutator inequalities via Schur products

    Christensen, Erik, 2016, Operator Algebras and Applications: The Abel Symposium 2015. Carlsen, T. M., Larsen, N. S., Neshveyev, S. & Skau, C. (eds.). Springer, p. 127-143 (Abel Symposia, Vol. 12).

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  10. Published

    Completely bounded isomorphisms of injective von neumann algebras

    Christensen, Erik & Sinclair, A. M., Jun 1989, In: Proceedings of the Edinburgh Mathematical Society. 32, 2, p. 317-327 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Completely bounded multilinear maps and C*-algebraic cohomology

    Christensen, Erik, Effros, E. G. & Sinclair, A., Jun 1987, In: Inventiones Mathematicae. 90, 2, p. 279-296 18 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Completely order isomorphic and close C-algebras need not BE, *-isomorphic

    Choi, M. D. & Christensen, Erik, Nov 1983, In: Bulletin of the London Mathematical Society. 15, 6, p. 604-610 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    Decompositions of block schur products

    Christensen, Erik, 2020, In: Journal of Operator Theory. 84, 1, p. 139-152

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Derivations and their relation to perturbations of operator algebras

    Christensen, Erik, 1982, American Mathematical Society Symposia . Vol. 38. p. 261 - 273 13 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  15. Published

    Derivations of nest algebras

    Christensen, Erik, Jun 1977, In: Mathematische Annalen. 229, 2, p. 155-161 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Dirac operators and spectral triples for some fractal sets built on curves

    Christensen, Erik, Ivan, C. & Lapidus, M. L., 2008, In: Advances in Mathematics. 217, 1, p. 42 - 78 37 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Extension of derivations

    Christensen, Erik, Feb 1978, In: Journal of Functional Analysis. 27, 2, p. 234-247 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Extensions and degeneration of spectral triples

    Christensen, Erik & Ivan, C., 2009, In: Communications in Mathematical Physics. 285, 3, p. 925-955 31 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Extensions of derivations II

    Christensen, Erik, 1982, In: Mathematica Scandinavica. 50, p. 111 -122 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Finite von Neumann algebra factors with property Gamma

    Christensen, Erik, 2001, In: Journal of Functional Analysis. 186, p. 366-380

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    Generators of semigroups of completely positive maps

    Christensen, Erik, Jun 1978, In: Communications in Mathematical Physics. 62, 2, p. 167-171 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    Higher weak derivatives and reflexive algebras of operators

    Christensen, Erik, 2016, Operator Algebras and Their Applications: A Tribute to Richard V. Kadison. Doran, R. S. & Park, E. (eds.). American Mathematical Society, p. 69-83 (Contemporary Mathematics, Vol. 671).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  23. Published

    Hochschild cohomology of factors with property Gamma

    Christensen, Erik, Sinclair, A. M. & Smith, R. R., 2003, In: Annals of Mathematics. 158, 2, p. 597-621

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Kadison-Kastler stable factors

    Cameron, J., Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. A. & Wiggins, A. D., 2014, In: Duke Mathematical Journal. 163, 14, p. 2639-2686 57 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Konvekse mængder

    Christensen, Erik, 2001, 106 p.

    Research output: Book/Report › Book › Communication

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