  There are 6 types of 2-dimensional representations in general. For any groups
and any monoids, we can construct the moduli of 2-dimensional representations
for each type: the moduli of absolutely irreducible representations,
representations with Borel mold, representations with semi-simple mold,
representations with unipotent mold, representations with unipotent mold over
${\Bbb F}_2$, and representations with scalar mold. We can also construct them
for any associative algebras.
