It is interesting that Poisson did not exhibit the chauvinistic attitude of many scientists of his day. Lagrange and Laplace recognised Fermat as the inventor of the differential and integral calculus; he was French after all while neither Leibniz nor Newton were! Poisson, however, wrote in 1831:
Ito ay kagiliw-giliw na Poisson hindi ipalabas ang makatsowinista attitude ng mga siyentipiko ng kanyang araw. Lagrange at Laplace na kinikilala bilang Fermat ang manlilikha ng mga kaugalian at integral calculus; siya ay French matapos ang lahat ng habang ni Leibniz ni Newton ay! Poisson, gayunpaman, wrote in 1831: