Results 91 to 100 of about 1,135,760 (216)

A Galois Connection for Reduced Incidence Algebras [PDF]

open access: yesProceedings of the American Mathematical Society, 1974
If N = { 1 , ⋯
openaire   +1 more source

World War Memorial rotunda at Ohio State Museum

open access: yes, 1940
This photograph shows two men at the "War Today" exhibit at the Ohio State Museum, meant to teach visitors about the current world conflict. The building pictured, also called Sullivant Hall, is located at Fifteenth Avenue and North High Street and was ...
Ohio History Connection
core  

A Meta-Logical Framework for the Equivalence of Syntactic and Semantic Theories

open access: yesPhilosophies
This paper introduces a meta-logical framework—based on the theory of institutions (a categorical version of abstract model theory)—to be used as a tool for the formalization of the two main views regarding the structure of scientific theories, namely ...
Maria Dimarogkona   +2 more
doaj   +1 more source

Formal Context Transforms and Their Affordances for Exploratory Data Analysis

open access: yesMathematics
Consider a formal context (G, M, I) as the basic mechanism to capture information about a set G of objects, a set M of attributes and the relation I ∈ G × M between them. Traditional use of Formal Concept Analysis has some shortcomings in its information-
Francisco J. Valverde-Albacete   +4 more
doaj   +1 more source

Ohio History Center Groundbreaking photographs

open access: yes, 1966
Governor James Rhodes used an Ohio-shaped shovel to turn the first earth for the new Ohio History Center, shown here on on August 22, 1966. The Ohio Historical Society (now the Ohio History Connection) moved to the new building, located near the Ohio ...
Ohio History Connection
core  

An introduction to Differential Galois Theory

open access: yes, 2023
openIn questa tesi verrà introdotta la Teoria di Galois Differenziale, detta anche Teoria di Picard-Vessiot, la quale riprende le idee della Teoria di Galois classica e le applica allo studio delle soluzioni di equazioni differenziali. Verranno definite
TACCHETTI, EDOARDO
core  

Nonvanishing minors of eigenvector matrices and consequences

open access: yesSpecial Matrices
For a matrix M∈Kn×n{\bf{M}}\in {{\mathbb{K}}}^{n\times n}, we establish a condition on the Galois group of the characteristic polynomial φM{\varphi }_{{\bf{M}}} that induces nonvanishing of the minors of the eigenvector matrix of M{\bf{M}}.
Emmrich Tarek
doaj   +1 more source

Galois Connections and Applications [PDF]

open access: yes, 2004
Preface M. Erne Adjunctions and Galois Connections: Origins, History and Development G. Janelidze Categorical Galois Theory: Revision and Some Recent Developments M. Erne The Polarity between Approximation and Distribution K. Denecke, S.L. Wismath Galois Connections and Complete Sublattices R.
openaire   +1 more source

Ohio Historical Society Communication Exhibit photograph

open access: yes, 1970
This photograph documents visitors to the Ohio Historical Society's exhibit on communication. The exhibit was one of the first to open in the new Ohio History Center in 1970. The photograph measures 9.5" x 7.5" (24.13 x 19.05 cm). Founded in 1885, the
Ohio History Connection
core  

A Galois connection for valued constraint languages of infinite size

open access: yes, 2015
A Galois connection between clones and relational clones on a fixed finite domain is one of the cornerstones of the so-called algebraic approach to the computational complexity of non-uniform Constraint Satisfaction Problems (CSPs).
Peter Fulla   +3 more
core   +1 more source

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