Ole Christensen

Search results

• 2010

  A note on finite dual frame pairs

  Christensen, O., Powell, A. & Xiao, X., 2010

  Research output: Book/Report › Report › Research

• Characterizing R-duals in Banach spaces

  Christensen, O., Xiao, X. & Zhu, Y. C., 2010

  Research output: Book/Report › Report › Research

• Dual pairs of Gabor frames for generators without the partition of unity property

  Christensen, O. & Sielemann Jakobsen, M., 2010

  Research output: Book/Report › Report › Research

• Exponential B-splines and the partition of unity property

  Christensen, O. & Massopust, P., 2010

  Research output: Book/Report › Report › Research

• Gabor windows supported on [-1,1] and dual windows with short support

  Christensen, O., Kim, H. O. & Rae Young, K., 2010

  Research output: Book/Report › Report › Research

• On the duality principle by Casazza, Kutyniok, and Lammers

  Christensen, O., Kim, H. O. & Kim, H. O., 2010

  Research output: Book/Report › Report › Research
• 2009

  Gabor windows supported on [-1,1] and compactly supported dual windows.

  Christensen, O., Rae Young, K. & Kim, H. O., 2009, Kgs. Lyngby, Denmark: Technical University of Denmark. (Mat-report).

  Research output: Book/Report › Report › Research
• 2008

  Approximately dual frames in Hilbert spaces and applications to Gabor frames

  Christensen, O. & Laugesen, R., 2008, MAT: Mat-report. 23 p. (MAT-Report; No. 07).

  Research output: Book/Report › Report › Research

• On dual Gabor frame pairs generated by polynomials

  Christensen, O. & Kim, R. Y., 2008, (Mat-Report; No. 2008-1).

  Research output: Book/Report › Report › Research
• 2007

  Explicitly given pairs of dual frames with compactly supported generators and applications to irregular B-splines

  Christensen, O. & Sun, W., 2007, Department of Mathematics, Technical University of Denmark. 9 p. (MAT-Report; No. 2007-7).

  Research output: Book/Report › Report › Research

• Pairs of oblique dual frames in spaces of periodic functions

  Christensen, O. & Goh, S. S., 2007, Department of Mathematics, Technical University of Denmark. 22 p. (MAT-Report; No. 2007-6).

  Research output: Book/Report › Report › Research
• 2006

  Characterization and perturbation of Gabor frame sequences with rational parameters

  Bownik, M. & Christensen, O., 2006

  Research output: Book/Report › Report › Research

• Frame properties of wave packet systems

  Christensen, O., 2006

  Research output: Book/Report › Report › Research

• Tight matrix-generated Gabor frames

  Christensen, O. & Kim, R. Y., 2006

  Research output: Book/Report › Report › Research
• 2005

  A perturbation theorem for Banach frames

  Casazza, P. & Christensen, O., 2005, (Mat-Report).

  Research output: Book/Report › Report › Research › peer-review

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• Pairs of dual Gabor frames with compact support and desired frequency localization

  Christensen, O., 2005, (Mat-Report).

  Research output: Book/Report › Report › Research

• Pairs of explicitly given dual Gabor frames in several dimensions

  Christensen, O. & Kim, R. Y., 2005, (Mat-Report).

  Research output: Book/Report › Report › Research

• Riesz sequences of translates and their generalized duals

  Christensen, O., Kim, H. O., Kim, R. Y. & Lim, J. K., 2005

  Research output: Book/Report › Report › Research
• 2004

  Characterization of oblique dual frame pairs

  Eldar, Y. & Christensen, O., 2004

  Research output: Book/Report › Report › Research › peer-review

• Density results for frames of exponentials

  Christensen, O., Casazza, P., Li, S. & Lindner, A., 2004, (Mat-report; No. 9).

  Research output: Book/Report › Report › Research › peer-review

• Frames for subspaces and generalized duals

  Christensen, O. & Eldar, Y., 2004

  Research output: Book/Report › Report › Research › peer-review

• Perturbation of frame sequences in shift-invariant spaces

  Christensen, O., Kim, H. O., Kim, R. Y. & Lim, J. K., 2004

  Research output: Book/Report › Report › Research › peer-review

• Stability of wavelet frames with matrix dilations

  Christensen, O. & Sun, W., 2004

  Research output: Book/Report › Report › Research › peer-review
• 2003

  Frame expansions in separable Banach spaces

  Casazza, P. G., Christensen, O. & Stoeva, D. T., 2003

  Research output: Book/Report › Report › Research

• Frames and the Feictinger Conjecture

  Casazza, P. G., Christensen, O., Lindner, A. M. & Vershynin, R., 2003

  Research output: Book/Report › Report › Research

• Linear independence in functions spaces

  Christensen, O. & Christensen, K. L., 2003

  Research output: Book/Report › Report › Research

• Oblique dual frames and shift-invariant spaces

  Christensen, O. & Eldar, Y., 2003

  Research output: Book/Report › Report › Research

• The finite section method and problems in frame theory

  Christensen, O. & Strohmer, T., 2003

  Research output: Book/Report › Report › Research
• 2002

  Frames and multiresolution analysis

  Christensen, O., 2002

  Research output: Book/Report › Report › Research

• On frames and multiresolution analysis

  Christensen, O., 2002

  Research output: Book/Report › Report › Research › peer-review
• 2001

  Classification of certain irregular Gabor frames.

  Christensen, O., 2001

  Research output: Book/Report › Report › Research › peer-review

• Decomposition of Riesz frames and waveletsinto a finite union of linearly independent sets

  Christensen, O., 2001

  Research output: Book/Report › Report › Research › peer-review

• Irregular Wavelet Frames and Gabor Frames

  Christensen, O., Favier, S. & Zó, F., 2001

  Research output: Book/Report › Report › Research › peer-review

• Methods for approximation of the inverse frame operator

  Christensen, O., 2001

  Research output: Book/Report › Report › Research

• On Riesz-Fischer sequences and lower frame bounds

  Christensen, O., 2001

  Research output: Book/Report › Report › Research › peer-review
• 2000

  Frames, Riesz bases and discrete Gabor/wavelet expansions

  Christensen, O., 2000, 30 p.

  Research output: Book/Report › Report › Research › peer-review

• Frames constructed as linear combination of theelements in a frame

  Christensen, O., 2000, 12 p.

  Research output: Book/Report › Report › Research › peer-review

• Lower bounds for finite wavelet and Gabor systems

  Christensen, O. & Lindner, A. M., 2000

  Research output: Book/Report › Report › Research › peer-review
• 1999

  Frames of exponentials:lower frame bounds for finite subfamilies, and approximation of the inverse frame operator

  Christensen, O. & Lindner, A., 1999, (MAT-Report no.14).

  Research output: Book/Report › Report › Research
• 1998

  Approximation of the inverse frame operator and applications to Gabor frames

  Casazza, P. & Christensen, O., 1998, 20 p.

  Research output: Book/Report › Report › Research › peer-review

• Finite-dimensional approximation of the inverse frame operator and applications to wavelet frames and Weyl-Heisenberg frames

  Christensen, O., 1998, 13 p.

  Research output: Book/Report › Report › Research › peer-review

• Frames of translates

  Casazza, C., Kalton, N. & Christensen, O., 1998, 23 p.

  Research output: Book/Report › Report › Research › peer-review

• Weyl-Heisenberg frames for subspaces

  Casazza, P. & Christensen, O., 1998, 13 p.

  Research output: Book/Report › Report › Research › peer-review
• 1997

  Density of Gabor Frames

  Christensen, O., Heil, C. & Deng, B., 1997, 14 p.

  Research output: Book/Report › Report › Research › peer-review

• Frames and Schauder Bases

  Christensen, O. & Casazza, P., 1997, 7 p.

  Research output: Book/Report › Report › Research › peer-review

• Perturbation for Frames for a Subspace of a Hilbert Space

  Christensen, O., deFlicht, C. & Lennard, C., 1997, 18 p.

  Research output: Book/Report › Report › Research › peer-review
• 1996

  Operators with Closed Range and Perturbation of Frames for a Subspace

  Christensen, O., 1996, 14 p.

  Research output: Book/Report › Report › Research › peer-review

• Perturbation of Operators and Applications to Frame Theory

  Christensen, O. & Casazza, P., 1996, 22 p.

  Research output: Book/Report › Report › Research › peer-review

• Riesz Frames and Approximation of the Frame Coefficients

  Christensen, O., 1996, 15 p.

  Research output: Book/Report › Report › Research › peer-review