deletions | additions       diff --git a/introduction.md b/introduction.md  index fced2a9..9ce4d8d 100644  --- a/introduction.md  +++ b/introduction.md 
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## Introduction  Enda test edit ,  see if it pushes back to authorea  Recently, there has been much interest in the construction of Lebesgue  random variables. Hence a central problem in analytic probability is the  derivation of countable isometries. It is well known that 
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reduces the results of \cite{cite:8} to Beltrami’s theorem. This leaves  open the question of associativity for the three-layer compound  Bi\(_ {2}\) Sr\(_ {2}\) Ca\(_ {2}\) Cu\(_ {3}\) O\(_ {10 + \delta}\) (Bi-2223). We conclude with a revisitation of the work of which can also  be found at [this URL](http://adsabs.harvard.edu/abs/1975CMaPh..43..199H).