Mathematics
Found in 212 Collections and/or Records:
D. Tchurnhausi meth: Quadraturarum de Act: Erud: M.S., c1688
An article on quadrature, perhaps in the hand of its author, 'Tchurnhaus', for the Acta, c1688.
De aequationibus Cubicis, s.d.
Gregory on cubic equations.
De affirmanda parallaxi magni orbis, cogitatum Hugenii, June 1693
A transcription of Christiaan Huygen's argument that because stars' observed radii are so insensibly small, the diameter of the earth's orbit relative to the stars' position is also insensible, and thus the parallax measurement, which ought to prove or disprove the Copernican layout of the heavens, is useless.
De Aleis Theorema, 1680
Thoughts on dice-throwing, written up in Leyden, and contained (once with other things?) under the rubric "Varia Observationes". One of those may have been item C 154, next in the volume.
De Cartesiana Constructione ..., c1680
A note, probably composed at Rotterdam, on the Latin edition of Rene Descartes' Geometria, (1659), published by Schooten.
De Communi sectione superficiorum D.G., 1694
Notes on cylinders and spheres.
De Constructione problematum planorum, c1703
Certain propositions in Euclid.
De curva a Tschurnhausio in exemplum sua methodi adducta, 5 November 1688
An example of quadrature by 'Tschurnhaus', in Gregory's hand.
De Curva tractoria ubi longitudo tangentis datur, c1691
Gregory on the slopes of curves.
De Electionibus in Ludo Alea, 30 Sept. 1694
A game-theory jotting on dicing, after Halley.