Results 21 to 30 of about 582 (179)

Pre-Galois theory

open access: yesOsaka Journal of Mathematics, 2019
31 pages; expanded some explanations and added a new Remark 2.8(b) and Example 3 ...
Harbater, David, Dèbes, Pierre
openaire   +4 more sources

A History of Selected Topics in Categorical Algebra I: From Galois Theory to Abstract Commutators and Internal Groupoids [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2016
This paper is a chronological survey, with no proofs, of a direction in categorical algebra, which is based on categorical Galois theory and involves generalized central extensions, commutators, and internal groupoids in Barr exact Mal’tsev and more ...
George Janelidze
doaj  

Practice of the Incomplete $p$-Ramification Over a Number Field -- History of Abelian $p$-Ramification

open access: yesCommunications in Advanced Mathematical Sciences, 2019
The theory of $p$-ramification, regarding the Galois group of the maximal pro-$p$-extension of a number field $K$, unramified outside $p$ and $\infty$, is well known including numerical experiments with PARI/GP programs.
Georges Gras
doaj   +1 more source

Four-Fold Formal Concept Analysis Based on Complete Idempotent Semifields

open access: yesMathematics, 2021
Formal Concept Analysis (FCA) is a well-known supervised boolean data-mining technique rooted in Lattice and Order Theory, that has several extensions to, e.g., fuzzy and idempotent semirings.
Francisco José Valverde-Albacete   +1 more
doaj   +1 more source

DEFORMATION CONDITIONS FOR PSEUDOREPRESENTATIONS

open access: yesForum of Mathematics, Sigma, 2019
Given a property of representations satisfying a basic stability condition, Ramakrishna developed a variant of Mazur’s Galois deformation theory for representations with that property.
PRESTON WAKE, CARL WANG-ERICKSON
doaj   +1 more source

On the Galois Theory of Grothendieck

open access: yes, 2000
In this paper we deal with Grothendieck's interpretation of Artin's interpretation of Galois's Galois Theory (and its natural relation with the fundamental group and the theory of coverings) as he developed it in Expose V, section 4, ``Conditions axiomatiques d'une theorie de Galois'' in the SGA1 1960/61.
Dubuc, Eduardo J.   +1 more
openaire   +3 more sources

Dimensions of Prym varieties

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
Given a tame Galois branched cover of curves π:X→Y with any finite Galois group G whose representations are rational, we compute the dimension of the (generalized) Prym variety Prymρ(X) corresponding to any irreducible representation ρ of G. This formula
Amy E. Ksir
doaj   +1 more source

Efficiency of sequence synthesis methods with the «not more than one coincidence» property

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2016
The author presents an expression for determining the minimum possible length of binary sequences with "not more than one coincidence" property. Obtained low bound length value allows quantitatively estimating efficiency of any known synthesis methods ...
A. I. Nevrev, O. N. Galchenkov
doaj   +1 more source

Some fascinating developments in mathematics and music

open access: yesProceedings (European Academy of Sciences and Arts), 2022
The strength of the bonds between music and mathematics goes without saying. This popular belief hides a subtler misconception, that this relationship involves old-school mathematics: arithmetics in the Greek School (Pythagoras), diophantine ...
Emmanuel Amiot
doaj   +1 more source

Counting stabiliser codes for arbitrary dimension [PDF]

open access: yesQuantum, 2023
In this work, we compute the number of $[[n,k]]_d$ stabilizer codes made up of $d$-dimensional qudits, for arbitrary positive integers $d$. In a seminal work by Gross \cite{Gross2006} the number of $[[n,k]]_d$ stabilizer codes was computed for the case ...
Tanmay Singal   +5 more
doaj   +1 more source

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