Positive systems

Positive systems refer to a class of dynamic systems characterized by non-negativity in their states and outputs. In control theory and systems engineering, a system is considered positive if, given non-negative initial conditions and non-negative inputs, the system's states and outputs will remain non-negative for all time. ### Key Characteristics of Positive Systems: 1. **Non-Negativity**: All states and outputs of the system must stay non-negative whenever initial conditions and inputs are non-negative.