Heinrich_Christoph_Wilhelm_Sigwart
Heinrich Christoph Wilhelm Sigwart
German philosopher and logician (1789–1844)
Heinrich Christoph Wilhelm von Sigwart (31 August 1789 – 16 November 1844) was a German philosopher and logician. He was the father of Christoph von Sigwart (28 March 1830 – 4 August 1904), who also was a philosopher and logician.