This document provides an overview of key concepts in public international law related to state jurisdiction, state responsibility, and extradition. It discusses five principles of jurisdiction that states can use: territorial, nationality, passive personality, protective, and universality. The territorial principle allows jurisdiction based on where an act took place. State responsibility arises when a state violates its international legal obligations and causes damage. Extradition is the process by which one state surrenders an accused criminal to another state, and occurs through extradition treaties between states. The document also discusses exceptions and limitations to extradition.