Erik Christensen
Associate professor emeritus
Department of Mathematical Sciences
Universitetsparken 5, 2100 København Ø, 04 Matematik E, Building: 04-0-18
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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, 2Research output: Contribution to journal › Journal article › Research › peer-review
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A cohomological characterization of approximately finite dimension von Neumann algebras
Christensen, Erik, 1997, Operator Algebras and quantum field theory. Rom: International Press, p. 323-328Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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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
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Bilinear forms, Schur multipliers, complete boundedness and duality
Christensen, Erik, 2023, In: Mathematica Scandinavica. 129, 3, p. 543-569Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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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
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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
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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
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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
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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
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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
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Decompositions of block schur products
Christensen, Erik, 2020, In: Journal of Operator Theory. 84, 1, p. 139-152Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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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
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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
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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
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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
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Finite von Neumann algebra factors with property Gamma
Christensen, Erik, 2001, In: Journal of Functional Analysis. 186, p. 366-380Research output: Contribution to journal › Journal article › Research › peer-review
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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
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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
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Hochschild cohomology of factors with property Gamma
Christensen, Erik, Sinclair, A. M. & Smith, R. R., 2003, In: Annals of Mathematics. 158, 2, p. 597-621Research output: Contribution to journal › Journal article › Research › peer-review
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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
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ID: 4394
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The block Schur product is a Hadamard product
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On the complete boundedness of the Schur block product
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Decompositions of block schur products
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