(Continued)
Plato at Stanford:
Lacan and the Matheme of Fantasy
“… [in] the matheme of fantasy ($ ◊ a ),
the diamond-shaped “lozenge” (poinçon ) ◊
can be read as a condensation of four symbols:
one, ∧ (the logical symbol for conjunction [“and”]);
two, ∨ (the logical symbol for disjunction [“or”]);
three, > (the mathematical symbol for “greater than”); and,
four, < (the mathematical symbol for “less than”). As per
Lacan’s matheme, the subject’s desires are scripted and
orchestrated by an unconscious fundamental fantasy
in which the desiring subject ($) is positioned in relation to
its corresponding object-cause of desire ( a ).”
— plato.stanford.edu, Stanford Encyclopedia of Philosophy
Plato.stanford.edu on Lacan, and Halle Berry in 'Frankie and Alice'
The Stanford author: 

The author is a professor in Albuquerque.
For other perspectives, see that city in this journal.
For the film  authors, see IMDb.