A computational formalism for the group M(1, 1) of motions of the pseu
do-Euclidean plane is developed. The bases, wave functions, matrix ele
ments of operators, coherent states, and Clebsch-Gordan series are con
structed. A compendium of computational formulas for the M(2) group is
given. The results obtained for the M(1, 1) and M(2) groups are an im
portant step on the way to constructing the computational formalism fo
r the Poincare group playing the fundamental role in modem physics.