A
C
B
C
B
C
B
A
A
Schematic of a system with 3 independent regions of instability, A, B and C. Each region can have either wave #1 or #2 instability
BV1
BV2
BV3
From a local point of view, BV1 and BV2 are enough to represent all
possible states.
From a global point of view, BV2 and BV3 are independent, and
there are 63 independent states!