◀ ▲ ▶History / 18th-century / Person: De Tinseau, D'Amondans Charles
Person: De Tinseau, D'Amondans Charles
Charles Tinseau was a French mathematician who wrote on the theory of surfaces.
Mathematical Profile (Excerpt):
- However, there was still much pro-Spanish feeling in the region when Charles was growing up there.
- It seems highly unlikely that Tinseau would have become a mathematician but for the inspiring teaching and encouragement of Monge.
- For twenty years, from 1771 to 1791, Tinseau was an officer in the engineering corps.
- Certainly given his noble birth, one would expect Tinseau to be a supporter of the French monarchy and this was indeed the case; he was a passionate supporter of the Bourbons despite the problems that they were encountering.
- Tinseau joined in the efforts to support the doomed Bourbon monarchy but by this time the situation was out of control.
- There he led a collection of émigrés including Tinseau.
- Charles-Philippe travelled to Austria, Prussia, Russia, and England.
- Tinseau also lived in exile and conducted a vigorous campaign in support of the Bourbons and against the Revolution.
- He published a series of anti-Revolution writings from 1792 onwards and tried to organise uprisings in France, as did Charles-Philippe who made an unsuccessful attempt to land in the Vendée to lead a royalist rising there.
- Both men had a military career and Tinseau, with the rank of brigadier general, acted as aide de camp to Charles-Philippe.
- Tinseau supported the Allied powers against France and used his military knowledge to pass on information of strategic importance to the Allies.
- Tinseau was as opposed to Napoleon and all he stood for as he had been to the earlier years of the Revolution.
- This was vigorously rejected by Tinseau who continued to be a devoted supporter of the Bourbons.
- Tinseau, like Charles-Philippe, lived in exile in England and was offered British nationality by the government.
- Charles-Philippe returned to France after the fall of Napoleon but Tinseau did not return until 1816.
- Tinseau wrote on the theory of surfaces, working out the equation of a tangent plane at a point on a surface, and he generalised Pythagoras's theorem proving that the square of a plane area is equal to the sum of the squares of the projections of the area onto mutually perpendicular planes.
Born 19 April 1748, Besançon, France. Died 21 March 1822, Montpellier, France.
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Tags relevant for this person:
Astronomy
Thank you to the contributors under CC BY-SA 4.0! 
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- non-Github:
- @J-J-O'Connor
- @E-F-Robertson
References
Adapted from other CC BY-SA 4.0 Sources:
- O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive
