  A method to construct in explicit form the generators of the simple roots of
an arbitrary finite-dimensional representation of a quantum or standard
semisimple algebra is found. The method is based on general results from the
global theory of representations of semisimple groups. The rank two algebras
$A_2$, $B_2=C_2$, $D_2$ and $G_2$ are considered as examples. The generators of
the simple roots are presented as solutions of a system of finite difference
equations and given in the form of $N_l\times N_l$ matrices, where $N_l$ is the
dimension of the representation.
