Левенчук человек умный, но графику он, похоже, недооценивает.
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Кстати, недавно я узнал, что первым придумал ромб для обозначения развилки в алгоритмах Бартоломей из Рима.
Barthélemy de Romans
стр. 15, 16
Цитата:
This is already complicated enough when everything is stated in algebraic symbolism. In words, it is evidently worse, even when all rules are illustrated by examples.
If we accept that the subject is important (and for Barthélemy it is the high point of his treatise), Barthélemy therefore has very good reasons to introduce a graphic representation of the algorithms, which is almost certainly his own idea.
Цитата:
However, by freezing the oral formulae graphically,
Barthélemy makes it more clear (to us) that a fixed algorithm is really thought of.
The diagram helps as much as the Indian graphic representations of the algorithms by which algebraic equations are solved, and it has the same limitations (pace Nesselmann [1842: 302f], who saw no difference between these schemes and symbolic algebra): it is unable to represent more than one linear algorithm, and has no space for embedding (of subroutines, if we speak the algorithmic language; of the replacement of a single number by an algebraic
composite if we choose that language).
Я только не смог понять, когда жил этот Бартоломей.
Если кто-то знает, просьба сообщить.
Цитата:
The Compendy de la Praticque des Nombres (probably c. 1471), an abbaco manuscript written in French by a Dominican friar in southern France, Barthélemy de Romans. His negative numbers arose in the same type of problems discussed by others (horse purchases, etc.), and he used the same term “less than nothing” (meins de riens) as had been used in the Pamiers manuscript. (Spiesser 2004)