He was a friend of Mydorge and Descartes, but an opponent of Fermat.
From the time when Pascal and Fermat established its first principles, it has rendered most important daily services.
Several other discoveries, both in pure algebra and geometry, illustrate the name of Fermat.
Fermat's works should be consulted in connection with the early history of this theorem.
For the explanation of Fermat one may produce a still stronger testimony, with which he seems not to have been acquainted.
His genius in the theory of numbers was probably never excelled except by Fermat.
The hypothesis he brought forward seemed not very probable to Fermat, nor would it be permitted at present.
For purely geometrical questions the only general method available is practically that employed by Fermat.
It was issued as a challenge by Fermat to the English mathematicians of his day.
We should say, Fermat went to such a page, Archimedes went a few pages further.