Results 81 to 90 of about 257,077 (206)
Estimates for Analytic Functions Connected with Hankel Determinant
Ukrainian Mathematical Journal, 2021 UDC 517.5 We give an upper bound of Hankel determinant of the first order for the classes of an analytic function. In addition, an evaluation with the Hankel determinant from below will be given for the second angular derivative of analytic function. For new inequalities, the results of Jack's lemma and Hankel determinant were used.
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Nanophotonics, Volume 15, Issue 13, 13 July 2026.Numerical modeling of mesoscopic material response models that capture the quantum dynamics of electrons does not have to come with discouraging computational bottlenecks. The main message is that through a shift in perspective in modeling toward integral equation methods and exploiting symmetry‐based arguments, it is possible to capture complicated ...
Christos Mystilidis +4 more
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Polynomial-exponential 2D data models, Hankel-block-Hankel matrices and zero-dimensional ideals
, 2011 Subspace-based methods are popular for analysis of two-dimensional data that can be modeled by sums of polynomially modulated exponential (or “polynomial-exponential”) functions.
Usevich, Konstantin
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Linear Algebra and its Applications, 2000 Recently a definition of Hankel determinants \(H^n_k\) with entries in a finite-dimensional real vector space was given in terms of designants and Clifford algebra. Sylvester's identity can still be used for computing these determinants recursively, but the aim of this paper is to present a more efficient method avoiding the use of the Clifford algebra
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Photonic Doping of Epsilon‐Near‐Zero Bragg Microcavities
Nanophotonics, Volume 15, Issue 13, 13 July 2026.Photonic doping of an epsilon‐near‐zero (ENZ) Bragg microcavity at optical frequencies induces strong magnetic responses from dielectric inclusions, enabling intense field localization, Purcell enhancement, and tunable hybrid Bragg–Mie modes. The platform supports perfect magnetic conductor and epsilon‐and‐mu‐near‐zero regimes, offering opportunities ...
Ali Panahpour +2 more
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In Situ pH Determination Using 1H‐MRS Acetate Chemical Shift for Noninvasive Postmortem Examinations
NMR in Biomedicine, Volume 39, Issue 7, July 2026.The chemical‐shift difference between acetate and myo‐inositol measured by MRS enables estimation of pH in the acidic range. Noninvasive pH assessment in forensic investigations is demonstrated in 58 cases and validated by measurements in extracted tissue.
Sabina Frese +4 more
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Numerical Approach for the Frequency-Weighted Hankel-Norm Approximation [PDF]
, 2001 We derive new projection formulas for the model reduction method based on the frequency-weighted Hankel norm approximation (FWHNA). These formulas extend the applicability of the FWHNA method to frequency weights expressed as antistable right/left ...
Varga, Andras
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Residual Water Suppression in MRS Using HLSVD With Automatic Component Selection Strategy
NMR in Biomedicine, Volume 39, Issue 7, July 2026.Residual water signals in magnetic resonance spectroscopy distort baselines and hinder metabolite quantification. We propose an automatic residual water removal method using HLSVD with the metric, termed as residual water to metabolite variance ratio (RWVR), to guide component selection.
Yi‐Ru Lin +2 more
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Optimal Hankel Norm Model Reduction by Truncation of Trajectories [PDF]
We show how optimal Hankel-norm approximations of dynamical systems allow for a straightforward interpretation in terms of system trajectories. It is shown that for discrete time single-input systems optimal reductions are obtained by cutting 'balanced ...
Roorda, B., Weiland, S.
core
Solvability of the Hankel determinant problem for real sequences
, 2018 To each nonzero sequence s := {sn}n≥0 of real numbers, we associate the Hankel determinants Dn = detHn of the Hankel matrices Hn := (si+j)n i,j=0, n ≥ 0, and the nonempty set Ns := {n ≥ 1 Dn-1 ≠ 0}. We also define the Hankel determinant polynomials P0 :=
Christian Berg +3 more
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