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!