You're using an ancient browser to surf the modern web. Please update to the latest version (and don't use Internet Explorer!).

Leonardi.DB
a logical geometry project

Data Technology in Materials Modelling (2021), p. 77
by Horsch, Martin Thomas; Chiacchiera, Silvia; Cavalcanti, Welchy Leite; Schembera, Björn

Caption

Selected traditional (top) and generalized (bottom) modal squares of opposition from VIPRS. Here, occ[$I$] stands for "$I$ occurs", and $K_I C I$ stands for "$K_I$ conceptualizes $I$", arrows denote subsumption and solid lines denote complementarity (top) and logical negation with respect to the modal formula (bottom)

Logic

Aristotelian family
Non-Sigma
Number of labels per vertex (at most)
2
Equivalence between (some) labels of the same vertex
No
Analogy between (some) labels of the same vertex
No
Uniqueness of the vertices up to logical equivalence
Yes
Errors in the diagram
No

Geometry

Shape
Hexagon (irregular)
Colinearity range
0
Coplanarity range
2
Cospatiality range
0
Representation of contradiction
N.A.

Vertex description

Conceptual info
No
Mnemonic support (AEIO, purpurea ...)
No
Form
ellipse
Label type
linguistic
,
symbolic
Language
English
Lexical field
modalities
Contains partial sentences or single words
Yes
Contains abbreviations
No
Symbolic field
logic
Contains partial formulas or symbols
No
Logical system
modal logic

Edge description

Contains definitions of relations
No
Form
solid lines
,
none
,
dashed lines
Has arrowheads
Yes
Overlap
No
Curved
No
Hooked
Yes
As wide as vertices
No
Contains text
No
Label type
none

Style

Diagram is colored
Yes
Diagram is embellished
No
↑ Back to top ↑