CENTRO DI RICERCA MATEMATICA "ENNIO DE GIORGI" & DIPARTIMENTO DI MATEMATICA "LEONIDA TONELLI" - Pisa
Martedì 19 e Mercoledì 20 Settembre, alle ore 16.30, il Prof. KEN'ICHI TAKAHASHI (Kyushu University), studioso giapponese di ottica medievale e di cose galileiane terrà due conferenze presso il Centro De Giorgi:
"Galileo studies: on the development of his theory of motion"
Takahshi esporrà i risultati che ha appena pubblicato (anche se per ora solo in giapponese) in un libro in cui sintetizza i suoi studi su Galileo e il moto.
I seminari si terranno nella Sala Conferenze del Collegio Puteano (Piazza dei Cavalieri, 3 - Pisa).
Lecture 1: "On the Need to Rewrite the Historiography of Galilean Scholarship" As Galileo’s letter to Sarpi (dated 16 October, 1604) amply testifies, Galileo was caught by the false principle for the natural free fall, which insists that the instantaneous velocity (v) is proportional to the space traversed (S), that is, (v ∝S). According to the current historiography, Galileo liberated himself from the false principle so soon thereafter as to get the correct principle (v ∝T) and had his mature theory of motion successfully by 1610 when he left Padua for Florence. In this lecture I will argue that this current historiography is not well founded and that he still held the false principle in his Florentine period at least until 1618 or thereafter. To present the evidence for my alternative interpretation, I will offer a totally new analysis of all the extant copies which were made around 1616-1618 by his friends at the request of Galileo himself and then will shed new light on the theoretical difficulties Galileo actually confronted in his Florentine period.
Lecture 2: "On the Significance of the Double Distance Rule in Galileo’s Theory of Motion" In his final product, the Discorsi (1638), the Double Distance Rule does not appear as an independent proposition at first sight. However, the rule played a significant role in his theorizing process. It is not an exaggeration to say that its role was crucial for the emergence of the correct principle (v ∝T) from the false (v ∝S). In this lecture I will draw audience’s attention to a variety of roles that the rule had or might have had in his notes on motion, for instance, in folios 163v, 152r, 179rv, 116v, 85r and so forth of MS Gal. 72. In my understanding the rule does appear in disguise as proposition 1 of the second part of his treatise De motu locali.
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