Obstruction
发表于 2025-3-30 10:22:31
Gabi Förtsch,Heinz MeinholzIn this chapter, we begin with a discussion of mathematical induction. Next, we examine a number of properties of the integers, with an emphasis on divisibility and prime factorization. We conclude by introducing modular arithmetic.
Pillory
发表于 2025-3-30 13:04:11
Gabi Förtsch,Heinz MeinholzThis chapter contains some basic tools and definitions of module theory: exact sequences, pullbacks and pushouts, projective and injective modules, and injective hulls, with applications to rings. Sections 5 and 6 may be skipped.
CEDE
发表于 2025-3-30 18:33:42
Gabi Förtsch,Heinz MeinholzIn the previous chapters we developed the algebraic machinery for proving that the three famous geometric constructions are impossible. In this chapter we introduce some geometry and start to show the connection between algebra and the geometry of constructions.
Hyperalgesia
发表于 2025-3-30 21:09:30
Gabi Förtsch,Heinz MeinholzThis book has introduced some basic ideas from the part of abstract algebra which deals with fields. Use of these ideas made it relatively easy for us to prove the impossibility of the constructions mentioned in the Introduction.
龙卷风
发表于 2025-3-31 01:34:21
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Carcinogenesis
发表于 2025-3-31 07:17:42
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抛媚眼
发表于 2025-3-31 12:43:52
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Focus-Words
发表于 2025-3-31 13:52:55
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