A Mathematical Tapestry: Demonstrating the Beautiful Unity by Peter Hilton, Jean Pedersen, Sylvie Donmoyer PDF

By Peter Hilton, Jean Pedersen, Sylvie Donmoyer

ISBN-10:

ISBN-13: 1397805217641

ISBN-10: 0521764106

ISBN-13: 9780521764100

This easy-to-read publication demonstrates how an easy geometric inspiration finds attention-grabbing connections and ends up in quantity idea, the math of polyhedra, combinatorial geometry, and workforce idea. utilizing a scientific paper-folding method it's attainable to build a typical polygon with any variety of facets. This notable set of rules has ended in fascinating proofs of yes ends up in quantity thought, has been used to reply to combinatorial questions concerning walls of house, and has enabled the authors to acquire the formulation for the quantity of a standard tetrahedron in round 3 steps, utilizing not anything extra complex than simple mathematics and the main ordinary airplane geometry. All of those principles, and extra, demonstrate the wonderful thing about arithmetic and the interconnectedness of its quite a few branches. unique directions, together with transparent illustrations, allow the reader to achieve hands-on event developing those types and to find for themselves the styles and relationships they unearth.

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Extra resources for A Mathematical Tapestry: Demonstrating the Beautiful Unity of Mathematics

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6(c), (d) the FAT algorithm was executed on every other suitable vertex along the edge of the tape so that, in (c), the resulting figure, or its flipped version, could be woven together in a more symmetric way and, in (d), the excess could be folded neatly around the points. It is now natural to ask: (1) Can we use the same general approach used for folding a convex 7-gon to fold a convex N -gon with N odd, at least for certain specified values of N ? If so, can we always prove that the actual angles on the tape really converge to the putative angle we originally sought?

Our instructions seem to be, on the whole, quite comprehensible to most readers. However, there are two basic types of error that people seem prone to make in carrying out our instructions. Material error In doing mathematics, it is absurd to specify the quality of paper on which the mathematics should be done. However, when we describe to you how to make mathematical models, we must insist that the choice of material is not arbitrary. Instructions for making models that are easily constructed using gummed mailing tape are unlikely to be effective if a strip of paper taken from an exercise book is used instead.

5, would have to satisfy the equation 2x1 + π3 + = π, from which it follows that x1 = π3 − 2 . In the same way we can see that the new angle, x2 , created by the upward fold line, shown in frame 7, would have to satisfy the equation 2x2 + x1 = 2x2 + π3 − 2 = π, from which it follows that x2 = π3 + 22 . Continuing in this way we find that xk = π3 + (−1)k 2k . This tells us that every time we make a correct fold the error is cut in half and changes sign. So after 10 correct fold lines the error must be smaller than 1024 !

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A Mathematical Tapestry: Demonstrating the Beautiful Unity of Mathematics by Peter Hilton, Jean Pedersen, Sylvie Donmoyer


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