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1. • CommentRowNumber1.
   • CommentAuthorDavid_Corfield
   • CommentTimeMay 23rd 2023
   • PermaLink
   Author: David_Corfield
   Format: MarkdownItexAdded a clause to the 'gloss' > The binary relation of the frame allows for the modelling of the truth of a modal proposition, $\Diamond \phi$ or $\Box \phi$, at some world in terms of the truth of $\phi$ at related worlds. <a href="https://ncatlab.org/nlab/revision/diff/geometric+model+for+modal+logics/13">diff</a>, <a href="https://ncatlab.org/nlab/revision/geometric+model+for+modal+logics/13">v13</a>, <a href="https://ncatlab.org/nlab/show/geometric+model+for+modal+logics">current</a>

   Added a clause to the ’gloss’

   The binary relation of the frame allows for the modelling of the truth of a modal proposition, $\Diamond \phi$ or $\Box \phi$, at some world in terms of the truth of $\phi$ at related worlds.

   diff, v13, current

2. • CommentRowNumber2.
   • CommentAuthorDavid_Corfield
   • CommentTimeMay 23rd 2023
   • PermaLink
   Author: David_Corfield
   Format: MarkdownItexThis page needs an overhaul, when I have a moment. <a href="https://ncatlab.org/nlab/revision/diff/geometric+model+for+modal+logics/14">diff</a>, <a href="https://ncatlab.org/nlab/revision/geometric+model+for+modal+logics/14">v14</a>, <a href="https://ncatlab.org/nlab/show/geometric+model+for+modal+logics">current</a>

   This page needs an overhaul, when I have a moment.

   diff, v14, current

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeJul 16th 2023
   • (edited Jul 16th 2023)
   • PermaLink
   Author: Urs
   Format: MarkdownItexadjusted the lead-in Idea-sentence to be more inviting (still leaving loads of room to provide an actual Idea) added the original references: * [[Saul A. Kripke]], *A Completeness Theorem in Modal Logic*, The Journal of Symbolic Logic **24** 1 (1959) 1-14 &lbrack;[doi:10.2307/2964568](https://doi.org/10.2307/2964568), [jstor:2964568](https://www.jstor.org/stable/2964568), [pdf](https://www.filosoficas.unam.mx/~morado/Cursos/17Modal/Kripke1959.pdf)&rbrack; * [[Saul A. Kripke]], *Semantical Analysis of Modal Logic I Normal Modal Propositional Calculi*, Mathematical Logic Quaterly **9** 5-6 (1963) 67-96 &lbrack;[doi:10.1002/malq.19630090502](https://doi.org/10.1002/malq.19630090502)&rbrack; and this account: * [[Valentin Goranko]], [[Martin Otto]], §1 in: *Model Theory of Modal Logic*, in Section 5 in: *Handbook of Modal Logic*, Studies in Logic and Practical Reasoning **3** (2007) 249-329 &lbrack;[pdf](https://www2.mathematik.tu-darmstadt.de/~otto/papers/mlhb.pdf), [book webpage](https://cgi.csc.liv.ac.uk/~frank/MLHandbook/), [publisher page](https://www.sciencedirect.com/bookseries/studies-in-logic-and-practical-reasoning/vol/3/suppl/C)&rbrack; <a href="https://ncatlab.org/nlab/revision/diff/geometric+model+for+modal+logics/15">diff</a>, <a href="https://ncatlab.org/nlab/revision/geometric+model+for+modal+logics/15">v15</a>, <a href="https://ncatlab.org/nlab/show/geometric+model+for+modal+logics">current</a>

   adjusted the lead-in Idea-sentence to be more inviting (still leaving loads of room to provide an actual Idea)

   added the original references:

   • Saul A. Kripke, A Completeness Theorem in Modal Logic, The Journal of Symbolic Logic 24 1 (1959) 1-14 [doi:10.2307/2964568, jstor:2964568, pdf]

   • Saul A. Kripke, Semantical Analysis of Modal Logic I Normal Modal Propositional Calculi, Mathematical Logic Quaterly 9 5-6 (1963) 67-96 [doi:10.1002/malq.19630090502]

   and this account:

   • Valentin Goranko, Martin Otto, §1 in: Model Theory of Modal Logic, in Section 5 in: Handbook of Modal Logic, Studies in Logic and Practical Reasoning 3 (2007) 249-329 [pdf, book webpage, publisher page]

   diff, v15, current