Duality Patterns in 2-PCD Fragments (2017), p. 255
by Smessaert, Hans; Demey, Lorenz

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Caption

Summary of the Duality Patterns.

Logic

Aristotelian family

Sigma-2 Graph

Boolean complexity

3–4

Number of labels per vertex (at most)

1

Uniqueness of the vertices up to logical equivalence

No

Errors in the diagram

No

Geometry

Shape

Octagon (regular)

Colinearity range

0

Coplanarity range

0

Cospatiality range

0

Representation of contradiction

By central symmetry

Vertex description

Conceptual info

Yes

Mnemonic support (AEIO, purpurea ...)

No

Form

dots

Label type

generic placeholders

Edge description

Contains definitions of relations

No

Form

dash-double-dotted lines

,

solid lines

,

dash-dotted lines

,

none

Has arrowheads

No

Overlap

No

Curved

No

Hooked

No

As wide as vertices

No

Contains text

No

Label type

none

Style

Diagram is colored

No

Diagram is embellished

No

Tags

Leuven

;

duality