# This is Figure 3 from "Simple O(m log n) Time Markov Chain Lumping"
# by Valmari and Franceschinis.
{B1, B2, B345, B6}x(ℝ^X)

# elements of the same block are numbered from top to bottom
b6_1: (B6  , { b3_2: 1.0 })
b6_2: (B6  , { b4: 1.0 })
b3_1: (B345, { b1: 1.0 })
b3_2: (B345, { b1: 1.0 })
b4:   (B345, { b2: 0.5, b5: 0.5 })
b5:   (B345, { b5: 1.0 })
b1:   (B1  , { b1: 1.0 })
b2:   (B2  , { b2: 1.0 })