Quantization is one of the foundations of the much broader physics of quantum mechanics. These processes have many applications in fields such as finance, fluid mechanics, physics and biology. The rules of quantum mechanics are fundamental. He was also well versed in mechanics and mechanical devices. Dirac made fundamental contributions to the early development of both quantum mechanics and quantum electrodynamics. Examples abound in classical mechanics and quantum mechanics. The above equations are valid for both Newtonian mechanics and special relativity. Degeneracy plays a fundamental role in quantum statistical mechanics. LQG is an attempt to merge and adapt standard quantum mechanics and standard general relativity. Research on irreversibility in quantum mechanics takes several different directions. Issues about attempts to infer the second law of thermodynamics from statistical mechanics are examples. This hypothesis was at the basis of quantum mechanics. Start with an analogy with quantum mechanics. This was a pivotal result in the development of quantum mechanics. The effort at resolving these problems led to the development of quantum mechanics.