#This is the block of the trivial representation of PGL(2,R),
#ncontaining 2 principal series and 1 discrete series, dual to the block
#of the trivial representation of SL(2,R)

This is the Atlas of Reductive Lie Groups Software Package version 0.2.3.
Enter "help" if you need assistance.

empty: type
Lie type: A1 ad s
main: block
(weak) real forms are:
0: su(2)
1: sl(2,R)
enter your choice: 1
possible (weak) dual real forms are:
0: su(2)
1: sl(2,R)
enter your choice:
sorry, value must be one of 0,1
try again (? to abort): 1
Name an output file (hit return for stdout):
0(0,2):  0    (1,2)    [i2]  0
1(1,0):  2    (*,*)    [r2]  1  1
2(1,1):  1    (*,*)    [r2]  1  1