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Representations of Stream Processors Using Nested Fixed Points [PDF]

open access: yesLogical Methods in Computer Science, 2009
We define representations of continuous functions on infinite streams of discrete values, both in the case of discrete-valued functions, and in the case of stream-valued functions.
Neil Ghani   +2 more
doaj   +1 more source

Flow Faster: Efficient Decision Algorithms for Probabilistic Simulations [PDF]

open access: yesLogical Methods in Computer Science, 2008
Strong and weak simulation relations have been proposed for Markov chains, while strong simulation and strong probabilistic simulation relations have been proposed for probabilistic automata.
Lijun Zhang   +3 more
doaj   +1 more source

On the Complexity of Equivalence and Minimisation for Q-weighted Automata [PDF]

open access: yesLogical Methods in Computer Science, 2013
This paper is concerned with the computational complexity of equivalence and minimisation for automata with transition weights in the field Q of rational numbers.
Stefan Kiefer   +4 more
doaj   +1 more source

Tractable Combinations of Temporal CSPs [PDF]

open access: yesLogical Methods in Computer Science, 2022
The constraint satisfaction problem (CSP) of a first-order theory T is the computational problem of deciding whether a given conjunction of atomic formulas is satisfiable in some model of T.
Manuel Bodirsky   +2 more
doaj   +1 more source

Barriers in Concurrent Separation Logic: Now With Tool Support! [PDF]

open access: yesLogical Methods in Computer Science, 2012
We develop and prove sound a concurrent separation logic for Pthreads-style barriers. Although Pthreads barriers are widely used in systems, and separation logic is widely used for verification, there has not been any effort to combine the two.
Aquinas Hobor, Cristian Gherghina
doaj   +1 more source

Bootstrapping Inductive and Coinductive Types in HasCASL [PDF]

open access: yesLogical Methods in Computer Science, 2008
We discuss the treatment of initial datatypes and final process types in the wide-spectrum language HasCASL. In particular, we present specifications that illustrate how datatypes and process types arise as bootstrapped concepts using HasCASL's type ...
Lutz Schröder
doaj   +1 more source

Ologisms [PDF]

open access: yesLogical Methods in Computer Science, 2018
We introduce ologisms. They generate from ologs by extending their logical expressivity, from the possibility of considering constraints of equational nature only to the possibility of considering constraints of syllogistic nature, in addition.
Ruggero Pagnan
doaj   +1 more source

Fusarium solani infection disrupts metabolism during the germination of roselle (Hibiscus sabdariffa L.) seeds

open access: yesFrontiers in Plant Science, 2023
Fungal infections adversely influence the production and quality of seeds. Previously, Fusarium solani was reported as the causal agent of roselle (Hibiscus sabdariffa L.) seed rot. This study was designed to evaluate the effect of F. solani infection on
Aminallah Tahmasebi   +4 more
doaj   +1 more source

Logics for Unranked Trees: An Overview [PDF]

open access: yesLogical Methods in Computer Science, 2006
Labeled unranked trees are used as a model of XML documents, and logical languages for them have been studied actively over the past several years. Such logics have different purposes: some are better suited for extracting data, some for expressing ...
Leonid Libkin
doaj   +1 more source

The Complexity of Combinations of Qualitative Constraint Satisfaction Problems [PDF]

open access: yesLogical Methods in Computer Science, 2020
The CSP of a first-order theory $T$ is the problem of deciding for a given finite set $S$ of atomic formulas whether $T \cup S$ is satisfiable. Let $T_1$ and $T_2$ be two theories with countably infinite models and disjoint signatures.
Manuel Bodirsky, Johannes Greiner
doaj   +1 more source

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