Johann Heinrich Lambert

Johann Heinrich Lambert
Johann Heinrich Lambert (1728–1777)
Born	26 or 28 August 1728 Republic of Mulhouse, (currently Alsace, France)
Died	25 September 1777(1777-09-25) (aged 49) Berlin, Prussia
Nationality	Republic of Mulhouse, Swiss, French
Known for	First Proof that π is irrational Beer–Lambert law Lambert's cosine law Transverse Mercator projection Lambert W function
Scientific career
Fields	Mathematician, physicist, astronomer, and philosopher

Johann Heinrich Lambert (German: [ˈlambɛɐ̯t], Jean-Henri Lambert in French; 26 or 28 August 1728 – 25 September 1777) was a polymath from the Republic of Mulhouse, generally identified as either Swiss or French, who made important contributions to the subjects of mathematics, physics (particularly optics), philosophy, astronomy and map projections.