more from M Fitting/R Mendelsohn

### Single Idea 9735

#### [catalogued under 4. Formal Logic / D. Modal Logic ML / 2. Tools of Modal Logic / b. Terminology of ML]

Full Idea

A 'frame' consists of a non-empty set G, whose members are generally called possible worlds, and a binary relation R, on G, generally called the accessibility relation. We say the frame is the pair

Clarification

[the G and R are usually printed in a script font]

Gist of Idea

A 'frame' is a set G of possible worlds, with an accessibility relation R, written < G,R >

Source

M Fitting/R Mendelsohn (First-Order Modal Logic [1998], 1.6)

Book Reference

Fitting,M/Mendelsohn,R: 'First-Order Modal Logic' [Synthese 1998], p.12