This is the Atlas of Reductive Lie Groups Software Package version 0.2.3.
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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: 1
Name an output file (hit return for stdout):
0(0,2):  0  0  [i2]  0   (1,2)
1(1,0):  1  1  [r2]  2   (0,*)   1
2(1,1):  1  1  [r2]  1   (0,*)   1
block: klbasis
Name an output file (hit return for stdout):
Full list of non-zero Kazhdan-Lusztig-Vogan polynomials:

0: 0: 1

1: 0: 1
   1: 1

2: 0: 1
   2: 1

5 nonzero polynomials, and 0 zero polynomials,
 at 5 Bruhat-comparable pairs.