EuDML | Browse

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Displaying 141 – 160 of 259

Some properties of $B$ -operations

Bohdan Butkiewicz (2007)

Kybernetika

In the paper the problem of mathematical properties of $B$ -operations and weak $W B$ -operations introduced by the author for interpretation of connectives “and”, “or”, and “also” in fuzzy rules is considered. In previous author’s papers some interesting properties of fuzzy systems with these operations were shown. These operations are weaker than triangular norms used commonly for a fuzzy system described by set of rules of the type if – then. Monotonicity condition, required for triangular norms, is...

Some properties of E-m semigroups.

A. Varisco, Spoletini, A. Cherubini (1979)

Semigroup forum

Some properties of lattice ordered Rees matrix semigroups

Thérèse Merlier (1988)

Czechoslovak Mathematical Journal

Some properties of local subsemigroups inherited by larger subsemigroups.

T.E. Hall (1982)

Semigroup forum

Some properties of simple $I$ -regular semigroups

R. J. Warne (1970)

Compositio Mathematica

Some properties of $α$ -ideals and generalized $α$ -ideals, $n$ -semigroups and $n$ -groups

Antoni Chronowski (1994)

Czechoslovak Mathematical Journal

Some pseudovariety joins involving the pseudovariety of finite groups.

Jorge Almeida (1988)

Semigroup forum

Some quasi-ordered classes of finite commutative semigroups.

J. Almeida (1985)

Semigroup forum

Some Recent Results on Squarefree Words

Jean Berstel (1985)

Publications du Département de mathématiques (Lyon)

Some relations on the lattice of varieties of completely regular semigroups

Mario Petrich (2002)

Bollettino dell'Unione Matematica Italiana

On the lattice $L (C R)$ of varieties of completely regular semigroups considered as algebras with the binary multiplication and unary inversion within maximal subgroups, we study the relations $K_{l}$ , $K$ , $K_{r}$ , $T_{l}$ , $T$ , $T_{r}$ , $C$ and $L$ . Here $K$ is the kernel relation, $T$ is the trace relation, $T_{l}$ and $T_{r}$ are the left and the right trace relations, respectively, $K_{p} = K \cap T_{p}$ for $p \in \{l, r\}$ , $C$ is the core relation and $L$ is the local relation. We give an alternative definition for each of these relations $P$ of the form $U P V \Leftrightarrow U \cap \tilde{P} = V \cap \tilde{P} (U, V \in L (C R)),$ for some subclasses $\tilde{P}$ of $C R$ ....