In this video, we explore the idea of the uniqueness of coefficients in linear combinations, which leads us to the idea of components. While components can be thought of as lists of numbers, it is vital to distinguish between a vector and its components. We also explore some of the computational applications that components allow for.
This video is a part of "From Zero to Geo", a series where we formulate geometric algebra, an incredibly powerful branch of mathematics, from the ground up. Full playlist here: https://www.youtube.com/playlist?list=PLVuwZXwFua-0Ks3rRS4tIkswgUmDLqqRy
Next video here:
https://www.youtube.com/watch?v=If8r7vo4uoU
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Patreon Supporters:
AxisAngles
Christoph Kovacs
David Johnston
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Richard Penner
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Sections:
00:00 Introduction
00:36 Uniqueness of Coefficients
01:43 Argument for Uniqueness
03:05 Argument for Non-uniqueness
03:33 Condition for Uniqueness
04:08 Argument for Uniqueness in 3D
05:44 Components
07:32 Vector Are Not Lists of Numbers
09:01 Building Better Bases
10:33 Notation for the Standard Basis
11:52 Simple Exercise
12:43 Formulas for Vector Operations
13:14 Formula for Length in 2D
13:58 Formula for Length in 3D
15:35 Exercises
16:09 Conclusion