I am havingwas looking for the exact same question as OP, butclaim about another name:mathematician (namely Vazgain Avanissian. My) that I came to this question led me here. Following the clues left by the previous answer and then to the following namecomments, I found a mention of Pierre Fatou in Project Euclid. Fatou has been mentioned in the OP's comment. However, but not Vazgain yetthe piece below includes added information. It neither answer OP's questions asked in the body of the question, nor any information about the mathematician whom I am looking for. But it gives an answer to the "any" part of the title: "any other mathematician ...". I hope, this in turns leads someone else to a better picture of the situation.