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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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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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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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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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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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
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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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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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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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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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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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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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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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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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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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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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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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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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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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On some problems studied by R.V. Kadison
Christensen, Erik, 2003, In: Acta Mathematica Sinica. English series. 19, p. 523-534Research output: Contribution to journal › Journal article › Research › peer-review
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On non-selfadjoint representations of C*-algebras
Christensen, Erik, 1981, In: American Journal of Mathematics. 103, p. 817 - 833 17 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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Non-commutative integration for monotone sequentially closed C∗ algebras
Christensen, Erik, 1972, In: Mathematica Scandinavica. 31, p. 171-190 20 p.Research output: Contribution to journal › Journal 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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On the vanishing of Hn(A, A*) for certain C*-algebras
Christensen, Erik & Sinclair, A. M., Mar 1989, In: Pacific Journal of Mathematics. 137, 1, p. 55-63 9 p.Research 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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