did his findings influence any other great mathematician?
Yes, "Newton".
René Descartes
Current popular opinion holds that Descartes had the most influence of anyone on the young Newton, and this is arguably one of his most important contributions. 
what is the value of speed of light in vaccum Its exact value is defined as “approximately”, because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time interval of second. who was the first to attempt to measure it? "Isaac Beeckman", in 1629. who is he? He was a Dutch philosopher and scientist. did he also teach? Yes, he taught at a school in Rotterdam. any well-known students or followers of his? Yes, "Johan de Witt" and "René Descartes". which field of study did the latter specialize or teach in? Modern Philosophy was he for or against the church at the time? He had an opinion of support.
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René Descartes [SEP] Influence on Newton's mathematics
Current popular opinion holds that Descartes had the most influence of anyone on the young Newton, and this is arguably one of his most important contributions. Decartes's influence extended not directly from his original French edition of "La Géométrie", however, but rather from Frans van Schooten's expanded second Latin edition of the work. Newton continued Descartes's work on cubic equations, which will free the subject from fetters of the Greek perspectives. The most important concept was his very modern treatment of single variables.