"Version: 20251201"--Title page verso.Includes bibliographical references.1. Cryocooler fundamentals -- 1.1. Background -- 1.2. Types of cryocoolers -- 1.3. Book layout2. Mathematical fundamentals -- 2.1. Complex numbers -- 2.2. Phasors -- 2.3. Expansion series -- 2.4. Differential equations3. Thermodynamics -- 3.1. First and second laws -- 3.2. Enthalpy flows and energy accounting -- 3.3. Entr…