Thierry Joffredo
TJ
Signed articles
4 articles published in Tangente
Maths and HistoryN°228Feb 14, 2026Euler–Cramer: when nine points are no longer enough to define a cubic
The Euler–Cramer paradox: If nine points seem sufficient to determine a cubic curve, how can two distinct cubics also pass through those same nine points?
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Maths and HistoryN°228Feb 14, 2026Gabriel Cramer and Cramer's rule: an 18th-century mathematical discovery
The appendix to Gabriel Cramer's Introduction à l’analyse des lignes courbes algébriques contains the famous rule for solving systems of linear equations and Bézout's theorem.
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History and CultureN°228Feb 13, 2026Plotting algebraic curves in the eighteenth century: Newton's analytical parallelogram and Cramer's method
How did Gabriel Cramer plot algebraic curves in 1750? Discover Newton's analytical parallelogram and Cramer's analytical triangle.
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History and CultureN°228Feb 13, 2026Gabriel Cramer: the journey of an 18th-century Genevan mathematician
Explore Gabriel Cramer's journey, from his education in Geneva to his European Grand Tour among the leading mathematicians of his day.
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