EAN: 9781441920638

Bilder-Quelle: discount24.de - Sport-Freizeit

Many people think there is only one right way to teach geometry. For two millennia the right way was Euclid's way and it is still good in many respects. But in the 1950s the cry Down with triangles! was heard in France and new geometry books appeared packed with linear algebra but with no diagrams. Was this the new right way or was the right way something else again perhaps transformation groups? In this book I wish to show that geometry can be developed in four fundamentally different ways and that all should be used if the subject is to be shown in all its splendor. Euclid-style construction and axiomatics seem the best way to start but linear algebra smooths the later stages by replacing some tortuous arguments by simple calculations. And how can one avoid projective geometry? It not only explains why objects look the way they do it also explains why geometry is entangled with algebra. Finally one needs to know that there is not one geometry but many and transformation groups are the best way to distinguish between them. Two chapters are devoted to each approach: The ?rst is concrete and introductory whereas the second is more abstract. Thus the ?rst chapter on Euclid is about straightedge and compass constructions the second is about axioms and theorems. The ?rst chapter on linear algebra is about coordinates the second is about vector spaces and the inner product.

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19.11.2025 um 09:25 Uhr

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