Original: Jean Baptiste Joseph Fourier (21 March 1768 - 16 May 1830) was a French mathematician and physicist best known for initiating the investigation of Fourier series and their applications to problems of heat transfer and vibrations.
Simplified: Jean Baptiste Joseph Fourier (March 21, 1768 - May 16, 1830) was a French mathematician and physicist who is best known for starting the investigation of Fourier series and their use to problems of heat flow.