expdient
发表于 2025-3-28 17:38:38
Central Collineations: Properties, The collineation is . if there is a ., a point . where all lines on . are fixed, meaning the line is mapped to itself, although individual points on the line need not be fixed. We have seen that a collineation is central exactly when it has a line of fixed points, an ..
ARC
发表于 2025-3-28 19:13:14
Conic Sections in Early Modern Europe. First Part: Philippe de la Hire on Circles, in the sixteenth century, especially the translation by Commandinus, of Urbino, in 1566. Books 5, 6, and 7 were later found in Arabic manuscripts. Book 8 seems lost, although that loss has prompted several mathematicians, over the centuries, to propose their own restorations.
Eeg332
发表于 2025-3-29 01:09:18
Central Collineations: Complete Quadrilateral, Involution, and Hexagon Theorems, concept appeared in the work of Desargues, although the name was first used by L. Carnot in 1803. That it produces a harmonic set was recognized by La Hire in 1685. Its dual, the ., is a different way of viewing the same figure. (In the period we cover, the figure was always called a complete quadrilateral.)
glisten
发表于 2025-3-29 05:35:03
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锯齿状
发表于 2025-3-29 09:42:23
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使激动
发表于 2025-3-29 15:07:44
Incestuous Sibling Relationships: , and ,iagram into another. We call it a . because a line is always transformed to a line. We’ll soon explain the meaning of .. And how is a circle transformed? That is the marvelous part, for a circle becomes a parabola or ellipse or hyperbola—a conic section. And all conic sections can be formed this way.
Cpap155
发表于 2025-3-29 17:25:59
Family Support and Sibling Relationshipsme time philosophy emerged, reasoning by evidence and logical deduction about the great questions: what is our world made of, how and why does it change, how should we live? And mathematics that was formal and deductive.
chalice
发表于 2025-3-29 20:50:21
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FUSE
发表于 2025-3-30 01:25:09
Einflussfaktoren auf das Sicca-Syndrom,weightless lever when they are on opposite sides of the fulcrum, their distances from the fulcrum .. and .. must satisfy ... = .... His mathematical achievements include the discovery and proof of the volume formula for a sphere, and a method that can approximate ., the ratio of circumference to diameter of a circle, to any desired accuracy.
nitric-oxide
发表于 2025-3-30 06:24:49
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