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Automorphism groups of P1$\mathbb {P}^1$‐bundles over geometrically ruled surfaces

open access: yesJournal of the London Mathematical Society, Volume 113, Issue 6, June 2026.
Abstract We classify the pairs (X,π)$(X,\pi)$, where π:X→S$\pi \colon X\rightarrow S$ is a P1$\mathbb {P}^1$‐bundle over a non‐rational geometrically ruled surface S$S$ and Aut∘(X)$\mathrm{Aut}^\circ (X)$ is relatively maximal, that is, maximal with respect to the inclusion in the group Bir(X/S)$\mathrm{Bir}(X/S)$.
Pascal Fong
wiley   +1 more source

D-Posets with Meet Function

open access: yesAdvances in Electrical and Electronic Engineering, 2004
For any two observables on a full tribe we can always construct a two–dimensional observable. In this case the crucial role is played by pointwise multiplication of the functions of tribe.
Frantisek Kopka
doaj  

Very true operators on MTL-algebras

open access: yesOpen Mathematics, 2016
The main goal of this paper is to investigate very true MTL-algebras and prove the completeness of the very true MTL-logic. In this paper, the concept of very true operators on MTL-algebras is introduced and some related properties are investigated. Also,
Wang Jun Tao   +2 more
doaj   +1 more source

Conditional Measures on MV-algebras

open access: yesAdvances in Electrical and Electronic Engineering, 2004
In recent years many papers have been written generalizing some theorems, known from the Kolmogorovian probability theory, to MV-algebras. To achieve such results, so-called product MV-algebras were introduced and, using the product, the joint ...
Martin Kalina, Olga Nanasiova
doaj  

Orthocomplete Pseudo MV-algebras [PDF]

open access: green, 2015
Anatolij Dvurečenskij, Omid Zahiri
openalex   +2 more sources

A finite axiomatization of positive MV-algebras [PDF]

open access: green, 2022
Marco Abbadini   +3 more
openalex   +1 more source

Lexicographic pseudo MV-algebras

open access: yesJournal of Applied Logic, 2015
A lexicographic pseudo MV-algebra is an algebra that is isomorphic to an interval in the lexicographic product of a linear unital group with an arbitrary $\ell$-group. We present conditions when a pseudo MV-algebra is lexicographic. We show that a key condition is the existence of a lexicographic ideal, or equivalently, a case when the algebra can be ...
openaire   +2 more sources

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