Výsledky vyhledávání - "Algebra en Topologie"

Layer groups: Brillouin-zone and crystallographic databases on the Bilbao Crystallographic Server

Autor: Gemma de la Flor, Bernd Souvignier, Gotzon Madariaga, Mois I. Aroyo

Publikováno v: Acta Crystallographica. Section A, Foundations and Advances
Acta Crystallographica. A, Foundation and Advances, 77, 6, pp. 1-13
Acta Crystallographica. A, Foundation and Advances, 77, 1-13
Addi. Archivo Digital para la Docencia y la Investigación
instname
Acta crystallographica / A, 77 (6), 559-571

The section of the Bilbao Crystallographic Server (https://www.cryst.ehu.es/) dedicated to subperiodic groups contains crystallographic and Brillouin‐zone databases for the layer groups. The crystallographic databases include the generators/general

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::760bed48b9f52b0c177f6d0e92d76c4c
http://europepmc.org/articles/PMC8573847

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Hollandse helden: Stoffelijke resten, tastbare herinneringen aan wiskundigen

Autor: Bosma, W.

Publikováno v: Nieuw Archief voor Wiskunde, 21, 3, pp. 190-195
Nieuw Archief voor Wiskunde, 21, 190-195

Contains fulltext : 289725.pdf (Publisher’s version ) (Open Access)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::24860325de96775fdbb8828cf83ce050
https://hdl.handle.net/2066/289725

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Intuïtionistische wiskunde: Brouwers antwoord aan Cantor

Autor: Veldman, W.H.M.

Item does not contain fulltext Minisymposium 'De wiskundige L.E>J. Brouwer, een veelzijdig genie', 17 maart 2022 Noord-Hollandsarchief

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c669995c8a49401d17be311fb481da9f
http://hdl.handle.net/2066/247562

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Belgische Beelden: Stoffelijke resten, tastbare herinneringen aan wiskundigen

Autor: Bosma, W.

Publikováno v: Nieuw Archief voor Wiskunde, 23, 20-25
Nieuw Archief voor Wiskunde, 23, 1, pp. 20-25

Contains fulltext : 289726.pdf (Publisher’s version ) (Open Access)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::dc919ec2f38a68cc79c719a58a349495
http://hdl.handle.net/2066/289726

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Projective sets, intuitionistically

Autor: Veldman, W.H.M.

Publikováno v: Journal of Logic and Analysis, 14, pp. 1-85
Journal of Logic and Analysis, 14, 1-85

We study `definable' subsets of Baire space $\mathcal{N}$. The logic of our arguments is intuitionistic and we use L.E.J.~Brouwer's Thesis on bars in $\mathcal{N}$ and his continuity axioms. We avoid the operation of taking the complement of a subset

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Fixed point theorems for precomplete numberings

Autor: Henk Barendregt, Sebastiaan A. Terwijn

Publikováno v: Annals of Pure and Applied Logic, 170, 1151-1161
Annals of Pure and Applied Logic, 170, 10, pp. 1151-1161

In the context of his theory of numberings, Ershov showed that Kleene's recursion theorem holds for any precomplete numbering. We discuss various generalizations of this result. Among other things, we show that Arslanov's completeness criterion also

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a44679f1bf8a6c0dc88de87e51848c1a
https://doi.org/10.1016/j.apal.2019.04.013

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Diffraction enhancement of symmetry and modular structures

Autor: Akihiro Umayahara, Bernd Souvignier, Massimo Nespolo

Publikováno v: Acta Crystallographica. A, Foundation and Advances, 77, 1-1
Acta Crystallographica. A, Foundation and Advances, 78, 319-326
Acta Crystallographica. A, Foundation and Advances, 77, a2, pp. 1-1
Acta Crystallographica. A, Foundation and Advances, 78, 4, pp. 319-326

Diffraction enhancement of symmetry (DES) is the phenomenon according to which the symmetry of the diffraction pattern of a crystal can be higher than the point symmetry of the structure that has produced it. The most well known example is that of Fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ab2f80c73db3b57ed6efbcc1f1c3ee1
https://doi.org/10.1107/S0108767321091443

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Equality and Equivalence, Intuitionistically

Autor: Wim Veldman

Publikováno v: Logic, Epistemology, and the Unity of Science ISBN: 9783030536534
Mojtahedi, M.; Rahman, S.; Zarepour, M.S. (ed.), Mathematics, Logic, and their Philosophies: Essays in Honour of Mohammad Ardeshir, pp. 1-33

Item does not contain fulltext We show that the intuitionistic first-order theory of equality has continuum many complete extensions. We also study the Vitali equivalence relationVitali equivalence relation and show there are many intuitionistically

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::989061b3f9d68330b30e6790403b0469
https://doi.org/10.1007/978-3-030-53654-1_1

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Intuitionism: An Inspiration?

Autor: Wim Veldman

Publikováno v: Jahresbericht der Deutschen Mathematiker-Vereinigung, 123, 221-284
Jahresbericht der Deutschen Mathematiker-Vereinigung, 123, 4, pp. 221-284

Contains fulltext : 239847.pdf (Publisher’s version ) (Open Access)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e72d7b1067dff1d1bd269fedb7813d1
http://hdl.handle.net/2066/239847

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Extremal Binary PFAs in a Černý Family

Autor: Cambie, S., Bondt, M.C. de, Don, H.

Publikováno v: Moreira, N. (ed.), Developments in Language Theory: 25th International Conference, DLT 2021, Porto, Portugal, August 16–20, 2021, Proceedings, pp. 78-89

Item does not contain fulltext DLT 2021

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1236::1a319e96183591d729220786bfaf40e8
https://repository.ubn.ru.nl/handle/2066/239838

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