13. Group Theory
The chapter provides a foundational understanding of group theory within abstract algebra, emphasizing the key axioms that define a group along with various examples. It covers fundamental properties such as closure, associativity, identity, and inverses for different sets and operations, and introduces the concept of abstract groups and the relevance of group properties in broader applications, such as computer science and cryptography.
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Sections
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What we have learnt
- Groups are defined by four axioms: closure, associativity, identity, and the existence of inverses.
- Different sets, such as integers and real numbers, can exhibit group properties under certain operations.
- Abstract algebra enables the generalization of group properties to various contexts, enhancing our understanding and application in fields like cryptography.
Key Concepts
- -- Group Axioms
- The essential properties that define a group consisting of closure, associativity, identity, and inverses.
- -- Abelian Group
- A group that satisfies the additional property of commutativity in its operation.
- -- Abstract Group
- A group defined without specific elements or operations, allowing for general derivations of properties applicable to any instantiation.
- -- Group Order
- The number of elements in a group, which can be finite or infinite.
Additional Learning Materials
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