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Events on Saturday 25 March 1539 1
1539Tartaglia shares his solution to the cubic equationMathematician Gerolamo Cardano receives the formula under oath of secrecyNiccolo Tartaglia disclosed his method for solving cubic equations to Gerolamo Cardano, who swore an oath to keep it secret. Cardano later published the formula regardless, triggering a bitter priority dispute that still colors the formula's attribution today.