Algebra Book on how to write proper proofs in Group Theory

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SUMMARY

The discussion centers on the challenges faced by a learner of group theory using "Schaum's Outline of Group Theory." The user expresses frustration with the author's vague statements, excessive reliance on English over mathematical rigor, and the convoluted nature of some proofs. They seek recommendations for resources that provide clearer, more structured approaches to writing proofs in group theory. A free resource, "Course Notes on Group Theory" by J. Milne, is mentioned, although the user prefers to complete their current book first.

PREREQUISITES
  • Understanding of basic group theory concepts such as groups, subgroups, and group homomorphisms.
  • Familiarity with mathematical proof techniques, including direct proofs and proof by contradiction.
  • Experience with mathematical language and notation to interpret proofs accurately.
  • Basic knowledge of logical reasoning and structure in mathematics.
NEXT STEPS
  • Explore "How to Prove It: A Structured Approach" by Daniel J. Velleman for foundational proof techniques.
  • Study "Contemporary Abstract Algebra" by Joseph A. Gallian for clearer explanations and examples in group theory.
  • Learn about proof strategies specific to group theory, such as the use of cosets and Lagrange's theorem.
  • Utilize online resources like the free "Course Notes on Group Theory" by J. Milne for additional practice and clarity.
USEFUL FOR

Students of mathematics, particularly those studying abstract algebra, educators seeking teaching materials, and anyone looking to improve their skills in writing rigorous proofs in group theory.

jstrunk
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I am trying to learn group theory on my own from Schaum's Outline of Group Theory.
I chose this book because there are a lot of exercises with solutions, but I have several problems with it.
1) In many cases the author just makes some handwavey statement and I have to spend hours or days trying to figure out the what's behind his
pronouncement.
2) The solutions use too much English, as opposed to Math. English is imprecise and ambiguous. Maybe that's really how you do proofs in Group
Theory. This is the only book I have used, so i don't know. But it seems like clearer proofs could be made.
3) I often solve a problem in a different way that seems simpler to me, and I can't tell if I am missing some subtlety or if the author is being
unnecessarily convoluted. For instance, in many cases I think I can directly prove that G=H, say, but the author proves that G<or=H and H<or=G
so G=H.
The net result is that I never get to see what I consider to be a clear, full, proper proof of anything.
If I was taking a class, the teacher would be able to clear these things up, but on my own they are hard to deal with.
So I would appreciate any recommendations and a book that show how to write proper group theory proofs.
 
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