**X1-154 (2021/02/19)**

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Relativistic quantization, in terms of non-relativistic quantization
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The relation of energy conservation in terms of the position and momentum for a relativistic system, is written in terms of an analogous relation for a non-relativistic system. As a result, the quantization of the first system can be written in terms of the quantization of the second. Specifically, the quantization of the relativistic Kepler problem is expressed in terms of the quantization of the non-relativistic Kepler problem. The results obtained from the old and new quantum mechanics are compared with those obtained from the Klein-Gordon equation and those obtained from the Dirac equation.