*in which we view Möbius maps via matrices, and compose geometrically meaningful maps.
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# rotation

# Groups Lecture 19

*in which meet the orthogonal group and we rotate and reflect in two and three dimensions.
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# Groups Lecture 22

*in which we view Möbius maps via matrices, and compose geometrically meaningful maps.
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# Groups Lecture 20

*in which we rotate and reflect in two and three dimensions, and meet the unitary group.
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