A Communications Network

A Communications Network

A Communications Network

More Geometries

Pappus' Theorem

Pappus' Theorem

Axioms for the Finite Geometry of Pappus

Theorem 1.10

Theorem 1.10 (cont.)

Desargues

Desargues' Theorem

Desargues' Theorem

Desargues' Theorem

Desargues' Theorem

Desargues Geometry

Desargues Geometry

Axioms for Desargues' Geometry

A Few Theorems

A Proposition

A Proposition

Theorem 1.11

Theorem 1.12

Plane Duality Again

Plane Duals Again

Self-Dual Geometries

Fano's Geometry

PG(n,q)

PG(n,q)

Euclidean Geometry

Euclidean Geometry

Pasch's Axiom

Modern Treatments

Fixing up Euclid

An Alternative to Euclid

Axiom Systems