In Instant Insanity, a cube is an equivalence class of ordered
triples, each element of which is an equivalence class of ordered pairs of colors.
Proof: To dene the cube, only three pieces of information are needed, the sets
of the colors of the opposite faces. We know this is true since, if you were to
exchange the color of a pair of opposite faces, the resulting pair of faces would
still be bordered by faces of the same four colors as it was earlier. Thus, if you
are given the colors of three pairs of opposite faces, you will always make the
same cube. We know that the pairs of opposite faces can be represented using
an equivalence class of ordered pair of colors. We know that it needs to be an
equivalence class as a pair of sides designated as (Red,Green) is equivalent to
the pair designated (Green,Red). The order of the sets of opposite sides does
not matter; the entire cube is represented as an equivalence class of ordered
triples, with each element being an equivalence class of ordered pairs.
Every cube can be represented as a graph. The graph of the cube would have
the set of the four colors as vertices. Each equivalence class of ordered pairs
would represent an edge where the endpoints of the edge are the elements of the
ordered pair. So if a cube has an equivalence class of ordered pairs (Red; Green),
the edge has endpoints at the red vertex and the green vertex. Every edge will
have the same label representing that they came from the same cube. A Catie