LAGRANGE, De la résolution des équations numériques, 1797
LAGRANGE, Joseph-Louis.
De la résolution des équations numériques de tous les degrés.
Paris, Duprat, An VI [1798].
4to (265x215 mm), viii-268-(2) pages. binding : Original blind wrappers. Cover worn.
First edition.
Full margin copy, as issue.
references: Cajori [p. 253 : "Lagrange traced all known algebraic solutions of equations to the uniform principle consisting in the formation and solution of equations of lower degree whose roots are linear functions of the required roots and of the roots of unity. He showed that the quintic cannot be reduced in this way, its resolvent being of the sixth degree. In this connection Lagrange had occasion to consider the number of values a rational function can assume when its variables are permuted in every possible way. In these studies we see the beginnings of the theory of groups."], Smith [I, 486: "It is probably that this more profoundly influenced later mathematical research that did that of any of his contemporaries, although it was an era of giants in this field."].
Price : 750 €
