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Database Error
Message:MySQL Query fail: INSERT INTO `ga_sessoes` (`id_sessao`, `id_user`, `ip`, `expiracao`, `local`) VALUES ('e786af162a79020be5ead008bec7f7a5', '0', '10.1.164.142, 216.73.216.190', '1786021736', '/fichaartigo?id=640');
MySQL Error:Data too long for column 'ip' at row 1
Date:Thursday, August 6, 2026 at 1:38:56 PM
Script:/fichaartigo?id=640
Data too long for column 'ip' at row 1
Database Error
Message:MySQL Query fail: INSERT INTO `ga_sessoes` (`id_sessao`, `id_user`, `ip`, `expiracao`, `local`) VALUES ('e786af162a79020be5ead008bec7f7a5', '0', '10.1.164.142, 216.73.216.190', '1786021736', '/fichaartigo?id=640');
MySQL Error:Data too long for column 'ip' at row 1
Date:Thursday, August 6, 2026 at 1:38:56 PM
Script:/fichaartigo?id=640
Gazeta de matemática

Entropic groupoids and abelian groups

Following ETHERINGTON, a groupoid G is said to be entropie, if the following condition holds: ab. cd = ac . bd for all a,b,c,d in G.

PDF do Artigo | PDF integral
Gazeta nº 103, pág. nº 3 | Categoria: Artigos | Palavras-Chave: gazeta, matemática, grupos, abelianos, grupóides
Autor(es): José Morgado |