[Deprecated] Real Analysis Lecture 9.1 Cones and Tangents

00:00 Recap
00:51 Left and Right Neighborhoods
10:40 Cones
16:30 Tangents
26:50 A Lemma (Uniqueness of Tangents)
34:28 Some Examples

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[the_hidden_library]

Errata: At 36:44 I write "[a, a+delta)" where I meant "[0, delta)". So from 36:44 onward, put a=0.