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Leonardi.DB
a logical geometry project

Duality Patterns in 2-PCD Fragments (2017), p. 236
by Smessaert, Hans; Demey, Lorenz

Caption

(a) Ordinary duality square, (b) collapsed duality pattern for an operator that is its own dual, (c) collapsed duality pattern for an operator that is its own internal negation.

Logic

Number of labels per vertex (at most)
2
Errors in the diagram
No

Geometry

Shape
Digon (regular)
Colinearity range
0
Coplanarity range
0
Cospatiality range
0
Representation of contradiction
By central symmetry

Vertex description

Conceptual info
No
Mnemonic support (AEIO, purpurea ...)
No
Form
none
Label type
symbolic

Edge description

Contains definitions of relations
No
Form
dash-double-dotted lines
,
solid lines
,
dash-dotted lines
Has arrowheads
No
Overlap
No
Curved
Yes
Hooked
No
As wide as vertices
No
Contains text
Yes
Label type
linguistic
Language
English
Contains partial sentences or single words
Yes
Contain abbreviations
Yes

Style

Diagram is colored
No
Diagram is embellished
No
Tags
Leuven
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