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Arbitrary–order trigonometric Fouriercollocation methods for…
www.damtp.cam.ac.uk/user/na/NA_papers/NA2014_03.pdf23 Oct 2014: k arethe node points and the quadrature weights of a quadrature formula, respectively.Here r is an integer with the requirement: 2 r k. ... b. gd(xN ) cos. ( πxNb. ))T,. (39). where U (t) denotes the N -dimensional vector with entries ui(t) u(xi, t),. -
On the discretisation of the semiclassical Schrödinger equation with …
www.damtp.cam.ac.uk/user/na/NA_papers/NA2015_02.pdf5 May 2015: In the context of the Schrödinger equation (1.1), this represented asignificant improvement over the more stringent convergence requirements of (Iserles& Nørsett 1999, Moan & Niesen 2008) which were obtained under a -
an2000.dvi
www.damtp.cam.ac.uk/user/na/NA_papers/NA2000_03.pdf26 Sep 2005: Acta Numerica (2005), pp. 1–148 c Cambridge University Press, 1999. Lie-group methods. Arieh Iserles. Department of Applied Mathematics and Theoretical Physics,. University of Cambridge, England. Email: a.iserles@damtp.cam.ac.uk. Hans Z. -
DAMTP 2014/NA02 On fast trust region methods for quadratic ...
www.damtp.cam.ac.uk/user/na/NA_papers/NA2014_02.pdf27 Aug 2014: The requirement dT Qk(p) < 0 before α iscalculated provides α > 0. -
A Generalized Sampling Theorem for StableReconstructions in Arbitrary …
www.damtp.cam.ac.uk/research/afha/people/anders/Adcock_Hansen1.pdf5 Oct 2013: Yet, as we shall now see, by dropping the requirement of consistency, we obtain areconstruction which circumvents the aforementioned issues associated with (3.2). ... This requirement is quite strong as we may verywell have that W /= H and S = H (e.g. -
Breaking the coherence barrier: A new theory forcompressed sensing ...
www.damtp.cam.ac.uk/research/afha/people/anders/BreakingCoherenceRevisionFinal.pdf2 Nov 2016: In Figure 4 we plot the absolute values of the entries of the matrix U for these threeexamples. ... r} {1,. ,r} be a permutation and let V be the matrix with entries vkl =δl,π(k). -
Analyzing the structure of multidimensional compressedsensing…
www.damtp.cam.ac.uk/research/afha/anders/dDCoherence_Arxiv.pdf24 Oct 2016: Analyzing the structure of multidimensional compressedsensing problems through coherence. A. JonesUniversity of Cambridge. B. AdcockSimon Fraser Univesity. A. HansenUniversity of Cambridge. Abstract. Recently it has been established that asymptotic -
On asymptotic structure in compressed sensingBogdan Roman ∗, Ben ...
www.damtp.cam.ac.uk/research/afha/people/anders/Asymptotic_10a.pdf24 Jul 2018: wavelets) called sparsitybasis. This means that its vector of coefficients x = Φf has at mosts nonzero entries. ... Fig. 5 shows theabsolute values of the entries of the matrix U for three examples. -
Analyzing the Structure of Multidimensional CompressedSensing…
www.damtp.cam.ac.uk/research/afha/people/alexj/dDCoherence9.pdf10 Jun 2014: Analyzing the Structure of Multidimensional CompressedSensing Problems through Coherence. A. JonesUniversity of Cambridge. B. AdcockPurdue Univesity. A. HansenUniversity of Cambridge. Abstract. In previous work it was established that asymptotic -
Moment-free numerical integration of highly oscillatory functions…
www.damtp.cam.ac.uk/user/na/NA_papers/NA2005_04.pdf14 Sep 2005: , f =. . f(x0). f(m01)(x0) f(xν). f(mν1)(xν). . For notational brevity we regard matrices as row vectors whose entries are column -
On the infinite-dimensional QR algorithm Matthew J. Colbrook*† and ...
www.damtp.cam.ac.uk/research/afha/anders/InfQR_COLBROOK.pdf6 Dec 2020: In other words, one can introduce zeros in the column below the diagonal entry. ... many non-zero entries in each column then we can replace WOT convergence by SOT convergence. -
The quest for optimal sampling:Computationally efficient,…
www.damtp.cam.ac.uk/research/afha/anders/Book_chapter19.pdf26 Mar 2014: l = 1,2,., (5). where π is a bijection that gives a nonincreasing rearrangement of the entries ofc(l), i.e. ... row (as opposed to row block) to be the maximum of its entries in that row. -
Image Processing for Fluid Dynamics Stuart Dalziel DL ...
www.damtp.cam.ac.uk/research/lab/digimage/track2d.pdf21 Oct 2014: The division into only eight levels is both to minimise the additional storage requirements for this information, and in the realisation that a greater degree of precision in determining the true ... While this may produce some mismatching, the -
Noname manuscript No.(will be inserted by the editor) Uniform ...
www.damtp.cam.ac.uk/user/na/NA_papers/NA2014_04.pdf14 Jun 2017: range. It is then in the next subsection, in Theorems 8–10, that this fine and coarsedecomposition is shown to bear fruit in the form of reduced requirements for quadrature. ... + sin. (ωλ ,1(ck,ck1)t. )t. [gλ ,1(ck,ck hkt)]3,100. . -
Analyzing the structure of multidimensional compressedsensing…
www.damtp.cam.ac.uk/research/afha/people/anders/dDCoherence_Arxiv.pdf24 Oct 2016: Analyzing the structure of multidimensional compressedsensing problems through coherence. A. JonesUniversity of Cambridge. B. AdcockSimon Fraser Univesity. A. HansenUniversity of Cambridge. Abstract. Recently it has been established that asymptotic -
Generalized sampling and the stable and accuratereconstruction of…
www.damtp.cam.ac.uk/user/na/NA_papers/NA2011_12.pdf22 Nov 2011: Because of the stringent requirements placed on thereconstruction basis, spectral reprojection consequently affords little flexibility to the user. ... Then En,m =‖B‖, where B Cnn is the Hermitian matrix. with (j,k)th entry 〈φj Pmφj,φk Pmφk〉R. -
Generalized sampling and the stable and accuratereconstruction of…
www.damtp.cam.ac.uk/research/afha/people/anders/BAACHSpecData.pdf5 Oct 2013: Because of the stringent requirements placed on thereconstruction basis, spectral reprojection consequently affords little flexibility to the user. ... Then En,m =‖B‖, where B Cnn is the Hermitian matrix. with (j, k)th entry 〈φj Pmφj , φk -
Generalized sampling and infinite-dimensionalcompressed sensing Ben…
www.damtp.cam.ac.uk/research/afha/people/anders/BAACHGSCS_Rev10.pdf21 Jan 2016: the || nonzero entries are allowed tohave arbitrary locations in N, regardless of the reconstruction algorithm used [15]. ... In particular, condition (5.7) is the requirementon the magnitude of the off-diagonal entries of the matrix PMUPNUPM. -
Breaking the coherence barrier: A new theory forcompressed sensing ...
www.damtp.cam.ac.uk/research/afha/anders/BreakingCoherenceRevisionFinal.pdf2 Nov 2016: In Figure 4 we plot the absolute values of the entries of the matrix U for these threeexamples. ... r} {1,. ,r} be a permutation and let V be the matrix with entries vkl =δl,π(k).
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