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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Von Neumann algebras as complemented subspaces of B(H)
Christensen, Erik & Wang, L., 2014, In: International Journal of Mathematics. 25, 9 p., 1450107.Research output: Contribution to journal › Journal article › Research › peer-review
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Universally bounded operators on von Neumann algebras of type II*U1
Christensen, Erik, 1994, Algebraic Methods in Operator Theory. Boston: Birkhäuser Verlag, p. 195-204Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Unique matrix factorizations associated to bilinear forms and Schur multipliers
Christensen, Erik, 2024, In: Linear Algebra and Its Applications. 688, p. 215-231Research output: Contribution to journal › Journal article › Research › peer-review
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Type II1 factors satisfying the spatial isomorphism conjecture.
Cameron, J., Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. & Wiggins, A. D., 2012, In: Proceedings of the National Academy of Sciences USA (PNAS). 109, 5, p. 20338 - 20343 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Two generalizations of the Gleason-Kahane-Z̀elazko theorem
Christensen, Erik, Jan 1997, In: Pacific Journal of Mathematics. 177, 1, p. 27-32 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The spatial isomorphism problem for close separable nuclear C*-algebras
Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. A. & Winter, W., 2010, In: Proceedings of the National Academy of Science of the United States of America. 107, 2, p. 587 - 591 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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The block Schur product is a Hadamard product
Christensen, Erik, 2020, In: Mathematica Scandinavica. 126, 3, p. 603-616Research output: Contribution to journal › Journal article › Research › peer-review
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The algebra of generalized compacts associated with a von Neumann algebra
Christensen, Erik, 1987, Operator Theory: Advances and applications.. Birkhäuser Verlag, Vol. 24. p. 51 - 58 8 p.Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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Sums of two-dimensional spectral triples
Christensen, Erik & Ivan, C., 2007, In: Mathematica Scandinavica. 100, 1, p. 35-60 26 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Subalgebras of a finite algebra
Christensen, Erik, Feb 1979, In: Mathematische Annalen. 243, 1, p. 17-29 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Structural properties of close II1 factors
Cameron, J., Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. & Wiggins, A. D., 2017, In: Münster Journal of Mathematics. 10, 1, p. 19-37Research output: Contribution to journal › Journal article › Research › peer-review
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Spectral triples for AF C*-algebras and metrics on the Cantor set
Christensen, Erik, 2006, In: Journal of Operator Theory. 56, p. 17-46Research output: Contribution to journal › Journal article › Research › peer-review
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Spectral triples and the geometry of fractals
Christensen, Erik, Ivan, C. & Schroe, E., 2012, In: Journal of Noncommutative Geometry. 6, p. 249 - 274 26 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Some points of view on Grothendieck's inequalities
Christensen, Erik, 2024, In: Linear Algebra and Its Applications. 691, p. 196-215Research output: Contribution to journal › Journal article › Research › peer-review
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Similarities of II_1 factors with property Gamma
Christensen, Erik, 1986, In: Journal of Operator Theory. 15, 2, p. 281 - 288 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Representations of completely bounded multilinear operators
Christensen, Erik & Sinclair, A. M., May 1987, In: Journal of Functional Analysis. 72, 1, p. 151-181 31 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Property Gamma factors and the Hochschild cohomology problem
Christensen, Erik, Pop, F., Sinclair, A. M. & Smith, R. R., 2003, In: Proceedings of the National Academy of Science of the United States of America. 100, p. 3865-3869Research output: Contribution to journal › Journal article › Research › peer-review
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Properly infinite aw*-algebras are monotone sequentially complete
Christensen, Erik & Pedersen, G. K., Jul 1984, In: Bulletin of the London Mathematical Society. 16, 4, p. 407-410 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Perturbations of type I von neumann algebras
Christensen, Erik, Jan 1975, In: Journal of the London Mathematical Society. s2-9, 3, p. 395-405 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Perturbations of operator algebras II.
Christensen, Erik, 1977, In: Indiana University Mathematics Journal. 26, p. 891 - 904 14 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Perturbations of nuclear C*-algebras.
Christensen, Erik, Sinclair, A. M., White, S., Smith, R. R. & Winter, W., 2012, In: Acta Mathematica. 208, p. 93-150 58 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Perturbations of C*-algebraic Invariants
Christensen, Erik, Sinclair, A. M., Smith, R. R. & White, S., 2010, In: Geometric and Functional Analysis. 20, 2, p. 368 - 397 30 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Perturbation of operator algebras
Christensen, Erik, Feb 1977, In: Inventiones Mathematicae. 43, 1, p. 1-13 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Pertrurbationer af operatoralgebraer
Christensen, Erik, 1984, 50 p.Research output: Book/Report › Book › Research › peer-review
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On weakly D-differentiable operators
Christensen, Erik, 2016, In: Expositiones Mathematicae. 34, 1, p. 27–42Research output: Contribution to journal › Journal article › Research › peer-review
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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