Results 51 to 60 of about 508,252 (212)

Signs, figures and time: Cavaillès on “intuition” in mathematics

open access: yesTheoria, 2010
This paper is concerned with Cavaillès’ account of “intuition” in mathematics. Cavaillès starts from Kant’s theory of constructions in intuition and then relies on various remarks by Hilbert to apply it to modern mathematics.
Pierre CASSOU-NOGUÈS
doaj   +1 more source

A characterization of operators via Berezin symbol and related questions

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023
In this paper, we characterize the hyponormal operators with regard to Berezin symbol and reproducing kernel. Also, we demonstrate several Berezin number inequalities for bounded linear operators.
Yamancı Ulaş
doaj   +1 more source

Hilbert functions and symbolic powers.

open access: yesMichigan Mathematical Journal, 1987
Let p be a prime ideal of the regular local ring R, and let \(p^{(n)}=p^ nR_ p\cap R\) be the n-th symbolic power of p. \textit{R. Cowsik} [in Algebra and its Applications, Int. Symp., New Delhi 1981, Lect. Notes Pure Appl. Math. 91, 13-14 (1984; Zbl 0562.13002)] asks whether the ring \(\oplus p^{(n)}\) is Noetherian; this question motivates much of ...
openaire   +2 more sources

The Berezin Symbol and Multipliers of Functional Hilbert Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1995
Summary: This paper focuses on a multiplicative property of the Berezin symbol \(\widetilde A\), of a given linear map \(A: {\mathcal H}\mapsto {\mathcal H}\), where \(\mathcal H\) is a functional Hilbert space of analytic functions. We show \(\widetilde{AB}= \widetilde A\widetilde B\) for all \(B\) in \({\mathcal B}({\mathcal H})\) if and only if \(A\)
openaire   +2 more sources

Hilbert symbols, class groups and quaternion algebras [PDF]

open access: yesJournal de théorie des nombres de Bordeaux, 2000
Let B be a quaternion algebra over a number field k . To a pair of Hilbert symbols {
Chinburg, Ted, Friedman Rafael, Eduardo
openaire   +3 more sources

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

open access: yesAdvanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal   +6 more
wiley   +1 more source

Advances in causal discovery methods for ecological time series

open access: yesBiological Reviews, EarlyView.
ABSTRACT Recent advances in data collection technologies (e.g. automated sensor networks, satellite remote sensing, and high‐throughput sequencing) have greatly expanded the availability of ecological time series, enabling new opportunities for causal analyses in dynamic ecosystems.
Kenta Suzuki   +6 more
wiley   +1 more source

The multiplicative Hilbert matrix [PDF]

open access: yes, 2016
It is observed that the infinite matrix with entries (√mnlog⁡(mn))−1 for m,n≥2 appears as the matrix of the integral operator Hf(s):=∫1/2 +∞f(w)(ζ(w+s)−1)dw with respect to the basis (n−s)n≥2; here ζ(s) is the Riemann zeta function and H is defined on ...
Vukotić, Dragan   +14 more
core   +1 more source

A Novel Four Single-Sideband M-QAM Modulation Scheme Using a Shadow Equalizer for MIMO System Toward 5G Communications

open access: yesSensors, 2019
Single-sideband (SSB) modulation through Hilbert transformation has successfully transmitted data using only half the bandwidth of the traditional scheme for the same amount of contained information.
Mohammed Mustafa Alhasani   +3 more
doaj   +1 more source

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