UsefulLinks
Mathematics
Group Theory
1. Introduction to Algebraic Structures
2. Definition of a Group
3. Fundamental Examples of Groups
4. Order of Elements and Groups
5. Subgroups
6. Cyclic Groups
7. Permutation Groups
8. Cosets and Lagrange's Theorem
9. Normal Subgroups and Quotient Groups
10. Group Homomorphisms
11. The Isomorphism Theorems
12. Group Actions
13. The Sylow Theorems
14. Direct Products and Sums
15. Structure of Finite Abelian Groups
16. Solvable and Nilpotent Groups
17. Composition Series and Jordan-Hölder Theorem
18. Free Groups and Presentations
19. Semidirect Products
20. Introduction to Representation Theory
21. Applications of Group Theory
4.
Order of Elements and Groups
4.1.
Definition of Order of a Group
4.2.
Definition of Order of an Element
4.3.
Computing Orders
4.3.1.
Order in Finite Groups
4.3.2.
Order in Infinite Groups
4.4.
Relationship between Element Order and Group Order
4.5.
Properties of Element Orders
4.5.1.
Order of Powers
4.5.2.
Order of Inverses
4.5.3.
Order in Abelian Groups
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3. Fundamental Examples of Groups
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5. Subgroups