Relativistic effects in element 137 (Feinmanium) and above

[Here](https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_chemistry) I saw that if an element above atomic no 137 has to exist, it must have electron speed greater than speed of light. My question is , has this calculation been done keeping in mind Einstein's relativity? {I am just asking, I have not done this calculation.} 




Yes, the value 137 occurs even considering Einstein's theory of special relativity. 


137 comes from considering Sommerfeld or Dirac relativistic theories, when the nucleus is modeled as a point.


See equation 1 of [A new method for solving the Z > 137 problem and for determination of energy levels of hydrogen-like atoms](http://arxiv.org/ftp/arxiv/papers/1307/1307.0209.pdf)


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