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## Aristaeus

(716 words)

(Αρισταιο̃ς;

*Aristaîos*). [German version] [1] Greek rural deity Rural deity linked with sheep, the discovery of olive oil and honey, hunting, healing, prophecy and the end- ing of a period of drought on Ceos (cf. Apoll. Rhod. 2,500 ff.). In literature he is famous for the death of his bees, which occurred because he was responsible for the death of Euridices, and he successfully searched for ways to restore the bee populations (Verg. G. 4,315-558). A. is a complex figure who can be found in Central Greece, in Arcadia, on Ceos and in Cyrene. He was the husband of Auto…**Source:**Brill’s New Pauly

## Quadrature of the circle

(1,369 words)

(ὁ τοῦ κύκλου τετραγωνισμός/

*ho toû kýklou tetragōnismós*, Latin*quadratura circuli*). [German version] I. The nature of the problem The quadrature of the circle is one of the three 'classic problems' (the other two being the trisection of an angle, cf. division of angles and circles, and the duplication of the cube) of ancient Greek mathematics. The problem is to find the side*x*of a square such that its area is equal to the area of a circle with radius*r*using a geometric procedure; that is, to determine the value of the variable*x*in the equation*x*2 = π*r*2. Accordingly, the solution to the q…**Source:**Brill’s New Pauly

## Theudius

(210 words)

[German version] (Θεύδιος;

*Theúdios*). Mathematician and philosopher from Magnesia, probably 4th century BC. The only information about him comes from the catalogue of mathematicians in Proclus's [2] commentary on Euclid [1. 67, Z. 12-20]. T. is mentioned there after Eudoxus [1] and before Philippus of Medma, who was a pupil of Plato [1]; Therefore, T. was probably a contemporary of Aristotle [6]. According to Proclus, T., Menaechmus [3] and Deinostratus conducted research together at the Academy (*Akadḗmeia*), improved the arrangement of the*'Elements'*, and put many limited pr…**Source:**Brill’s New Pauly

## Eutocius

(168 words)

[German version] (Eυτόκιος;

*Eutókios*) The mathematician E. of Ascalon was presumably born around AD 480; the widespread assumption that he was a pupil of the architect Isidorus of Miletus is hardly plausible [1. 488]. He wrote commentaries on three works of Archimedes [1] (*Perì sphaíras kaì kylíndrou*, Περὶ σφαίρας καὶ κυλίνδρου,*kýklou métrēsis*, κύκλου μέτρησις,*Perì epipédōn isorrhopiôn*, Περὶ ἐπιπέδων ἰσορροπιῶν, text editions [3. 1-319]) as well as on the first four books of Apollonius'*Kōniká*(Κωνικά) [13] (dedicated to Anthemius [3], text edition [4. 168-361]…**Source:**Brill’s New Pauly

## Gnomon

(272 words)

[German version] [1] see Groma see Groma (surveying) Folkerts, Menso (Munich) [German version] [2] see Clocks see Clocks (time measurement) Folkerts, Menso (Munich) [German version] [3] Arithmetic technical term Arithmetic technical term from Greek numerical theory. The term was adopted from geometry, where the

*gnomon*describes the shape of an angle bar that remains when a smaller square is removed from a larger square. The Pythagoreans represented arithmetic series with geometrically arranged dots (pebbles) in the form of figures, so t…**Source:**Brill’s New Pauly

## Philo

(5,673 words)

[German version] I Greek (Φίλων/

*Phíl**ōn*). [German version] [I 1] Athenian politician Athenian from Acharnae who was exiled by the Oligarchic regime in 404 BC (Triakonta). During the civil war, he lived as a*metoikos*(resident without Attic citizenship) in Oropos awaiting the outcome of events. Following his return, when he applied to join the*boulḗ*he was accused of cowardice and other misdemeanours at a dokimasia investigation (Dokimasia) (Lys. 31; possibly 398 BC). Walter, Uwe (Cologne) Bibliography Blass, vol.1, 480f. Th.Lenschau, A. Raubitschek, s.v. P. (2), RE 19, 2526f. …**Source:**Brill’s New Pauly

## Mechanical method

(255 words)

[German version] The ‘Method (Ἔφοδος;

*Éphodos*) of Archimedes [1] is our source for his mechanical method from which he derived geometric formulas. To compare the surfaces of two figures, he disassembled each into an infinite number of parallel lines and balanced them on a scale. On one side of the scale, one surface is hung up at one point, i.e., as a whole. On the other side, the surface is hung up along the entire arm, i.e., each layer remains where it is and acts with a different leverage. When ea…**Source:**Brill’s New Pauly