A derivation of the space-time expression of the Pauli–Jordan function (PJF) was shown and a more compact result was obtained. Compared to other derivations, the approach utilizes more physical image, such as a Lorentz invariance of the PJF. Furthermore, the approach does not need sophisticated mathematical techniques and is therefore more suitable for the beginner of quantum field theory, such as graduate students and senior undergraduates.

中文翻译：

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计算Pauli–Jordan函数

显示了Pauli–Jordan函数（PJF）的时空表达式的推导，并获得了更紧凑的结果。与其他推导相比，该方法利用了更多的物理图像，例如PJF的Lorentz不变性。此外，该方法不需要复杂的数学技术，因此更适合于量子场论的初学者，例如研究生和高年级本科生。