CYNIC
发表于 2025-3-21 20:09:35
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橡子
发表于 2025-3-21 22:36:07
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记忆
发表于 2025-3-22 04:19:01
Electrification Phenomena in Rocksdecessors Pythagoras, Theaetetus, and Eudoxus into one magnificent edifice. This book soon became the standard for geometry in the classical world. With the decline of the great civilizations of Athens and Rome, it moved eastward to the center of Arabic learning in the court of the caliphs at Baghda
alcohol-abuse
发表于 2025-3-22 06:32:43
https://doi.org/10.1007/978-981-10-3026-0way of recording ruler and compass constructions so that we can measure their complexity. We discuss what are presumably familiar notions from high school geometry as it is taught today. And then we present Euclid’s construction of the regular pentagon and discuss its proof.
tattle
发表于 2025-3-22 09:18:09
Surface Thermodynamics of Solid Electrode,ient by modern standards of rigor to supply the foundation for Euclid‘s geometry. This will mean also axiomatizing those arguments where he used intuition, or said nothing. In particular, the axioms for betweenness, based on the work of Pasch in the 1880s, are the most striking innovation in this se
Collision
发表于 2025-3-22 15:36:39
https://doi.org/10.1007/978-1-4684-3497-2d. The axioms of incidence are valid over any field (Section 14). For the notion of betweenness we need an ordered field (Section 15). For the axiom (C1) on transferring a line segment to a given ray, we need a property (*) on the existence of certain square roots in the field .. To carry out Euclid
Collision
发表于 2025-3-22 17:36:41
https://doi.org/10.1007/978-3-030-04591-3 geometries over fields studied in Chapter 3. We will show how to define addition and multiplication of line segments in a Hilbert plane satisfying the parallel axiom (P). In this way, the congruence equivalence classes of line segments become the positive elements of an ordered field . (Section 19)
BLOT
发表于 2025-3-22 21:25:24
Electroacoustical Reference Datang that two figures have equal content if we can transform one figure into the other by adding and subtracting congruent triangles (Section 22). We can prove all the properties of area that Euclid uses, except that “the whole is greater than the part.” This is established only when we relate the geo
Verify
发表于 2025-3-23 03:52:34
https://doi.org/10.1007/978-3-7091-6211-8Because of the construction of the field of segment arithmetic, one could even argue that the use of fields in Chapter 4 arises naturally from the geometry. In this chapter, however, we will make use of modern algebra, the theory of equations and field extensions, and in particular the Galois theory
思想上升
发表于 2025-3-23 05:46:19
https://doi.org/10.1007/978-1-4899-1715-7nd developed in all its glory by Bolyai and Lobachevsky. The purpose of this chapter is to give an account of this theory, but we do not always follow the historical development. Rather, with hindsight we use those methods that seem to shed the most light on the subject. For example, continuity argu