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Unification with Simple Variable Restrictions and Admissibility of $\Pi_{2}$-rules

open access: yes
We develop a method to recognize admissibility of $\Pi_{2}$-rules, relating this problem to a specific instance of the unification problem with linear constants restriction, called here "unification with simple variable restriction". It is shown that for
Almeida, Rodrigo Nicolau   +1 more
core  

Operad of posets 101: The Wixarika posets

open access: yes
We study objects whose definition is linked to partial orders. An algebra over the operad of posets is a set whose endomorphisms contain the endomorphisms of posets. Notable examples of such algebras include the zeta values, order polytopes, and shuffle series.
Arciniega-Nevárez, José Antonio   +2 more
openaire   +2 more sources

The structure of κ-maximal cofinitary groups. [PDF]

open access: yesArch Math Log, 2023
Fischer V, Switzer CB.
europepmc   +1 more source

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