Euler Characteristic Formula:
, where
is the number of vertices,
is the number of edges, and
is the number of faces.
Genus Formula:
, where
is the genus.
Equation 1. For each
,
.
Equation 2. For
, where
is an even integer,
.
Equation 3. For
, where
is an odd integer,
.
Equation 4. Let
be the order of the sum of the elements in
. The total number of edges,
, of the face produced by
is
.
Equation 5. The number of occurrences,
, of each face is
, where
is the order of the sum of the elements in
.
Equation 6. The number of darts,
, in
is
.