LWBtheory: Information about some propositional logics via the WWW

LWBtheory: Information about some Propositional Logics via the WWW

Imagine that you are not sure how the Hilbert-style calculus for S4 looks like, and somebody has taken your book about modal logics oo your desk. No problem if you have an internet access: Open http://lwbwww.unibe.ch:8080/LWBtheory.html in a WWW browser, search for Hilbert-style calculus in the chapter about S4, and after a few seconds you obtain the calculus, together with an example of a proo...

Double-Negation Elimination in Some Propositional Logics

This article answers two questions (posed in the literature), each concerning the guaranteed existence of proofs free of double negation. A proof is free of double negation if none of its deduced steps contains a term of the form n(n(t)) for some term t, where n denotes negation. The first question asks for conditions on the hypotheses that, if satisfied, guarantee the existence of a double-neg...

Some Propositional paraconsistent logics C-extensions

Some Useful Information about Micropropagation

This review article investigates a comprehensive description of the factors, methods, strategies, approaches and prerequisites influencing in vitro micropaopagation and the amount of their use across the world. The findings presented here are the results of the study of several hundred papers published all over the world. Tissue culture techniques are routinely used for micropropagation. Enhanc...

Adequacy Results for Some Priorean Modal Propositional Logics

Standard possible world semantics for propositional modal lan-guages ignore truth-value gaps. However, simple considerations suggest that it should not be so. In Section 1, I identify what I take to be a correct truth-clause for necessity under the assumption that some possible worlds are incomplete (i.e., “at” which some propositions lack a truthvalue). In Section 2, I build a world semantics,...