TLA+ (Temporal Logic of Actions)

TLA+ (Temporal Logic of Actions Plus) is a formal language used to specify and reason about complex systems, especially concurrent or distributed ones. It combines logic and mathematics to describe how a system's state changes over time through "actions" with precise rules. This helps engineers verify correctness, identify errors, and ensure reliability before building the actual system. TLA+ is valuable in designing software and hardware where correctness and safety are critical, providing a clear, unambiguous way to model, analyze, and verify system behavior.