Introduction to group theory

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Learn the fundamentals of group theory in this free course. Discover symmetries of two-dimensional figures, algebraic notation for symmetries, and how to check group axioms. Expand your knowledge to three-dimensional figures and enhance your understanding of symmetry. Start your journey today!

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This free course is an introduction to group theory, one of the three main branches of pure mathematics. Section 1 looks at the set of symmetries of a two-dimensional figure which are then viewed as functions. Section 2 introduces an algebraic notation for recording symmetries and calculating composites and inverses of symmetries. Section 3 introduces definitions and looks at how to check axioms for a group. Section 4 looks at how to prove that some properties of groups already looked at are general properties shared by all groups. Section 5 extends the ideas of symmetry to three-dimensions.

Course learning outcomes

After studying this course, you should be able to:

Explain what is meant by a symmetry of a plane figure

Find the composite of two symmetries

Find the inverse of a symmetry

Determine whether a given set and binary operation form a group by checking group axioms

Describe the symmetries of some bounded three-dimensional figures.

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    Introduction to group theory
    Introduction to group theory
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