The Infinity Point

From Labyrinth of the Line (March 2, 2011)—

"… construct the Golay code by taking the 24 points
to be the points of the projective line F₂₃ ∪ {∞}…."

— Robert A. Wilson

A simpler projective line— a Galois geometry
model of the line F₂ ∪ {∞}—

Here we may consider ∞ to be modeled*
by the third square above— the Galois window .

* Update of about 1 AM Jan. 25, 2012—
  This infinity-modeling is of course a poetic conceit,
  not to be taken too seriously. For a serious 
  discussion of points at infinity and finite fields,
  see (for instance) Daniel Bump's "The Group GL(2)."