Why are vector spaces and sub-spaces so crucial in math?

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Discussion Overview

The discussion centers around the significance of vector spaces and subspaces in mathematics, exploring their properties, applications, and the underlying concepts of linearity. Participants express curiosity about the foundational rules governing vector spaces and their implications in various mathematical contexts.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the importance of vector spaces, specifically what it means for a set of vectors to be closed under addition and scalar multiplication and to contain the zero vector.
  • Another participant argues that many interesting mathematical problems can be framed as linear algebra problems, suggesting that understanding vector spaces allows for broader applications across various fields such as geometry, systems of equations, and differential equations.
  • A different participant humorously shifts the focus to the importance of vectors themselves, emphasizing that linear algebra allows for the decomposition of problems into manageable parts, which is not possible with non-linear problems.
  • There is a light-hearted exchange among participants, with one expressing appreciation for another's humor and contributions.

Areas of Agreement / Disagreement

The discussion reflects a mix of curiosity and humor, with no clear consensus on the fundamental importance of vector spaces. Participants present differing perspectives on the significance of vector spaces and their applications, indicating that multiple views remain unresolved.

Contextual Notes

Some participants express uncertainty about the foundational rules of vector spaces and their implications, suggesting a need for further exploration of definitions and concepts.

Howers
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What exactly is so special about them?

What makes a set of vectors that are closed under addition/scalar multiplication and contain 0 so important in math? I've worked through many examples and always wonder... what do these rules mean.
 
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Because many interesting things have a vector space structure, and many interesting problems can be formulated as a linear algebra problem. So if you study them in general, that knowledge can be applied to all of these different scenarios.

In your course, you will probably see examples involving geometry, systems of equations, differential equations, polynomials, and maybe even other things.

Basically, you are simply continuing your algebra courses from high school -- you're simply progressing beyond the boring case where you're only manipulating real or complex numbers.
 
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is the rule (f+g)' = f' + g' useful in calculus?

do little brown bears go poopoo in the woods?

is W a moron?

am i a tedious old ****?if you answer yes to any of these then vectors spaces are GOOD for you.
 
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lolol

I just upgraded you from my favorite mathematician to my favorite human being.
 
I think you should be asking not why is "a set of vectors that are closed under addition/scalar multiplication and contain 0 so important in math" but why vectors themselves are important.

"Linear Algebra" encapsulates the whole concept of "linearity"- that we can break a problem into pieces, solve each piece, and then put them together for a solution to the original problem. You can't do that with "non-linear" problems. That's why vector spaces are important and sub-space are, of course, vector spaces. Arbitrary sets of vectors are not vector spaces.
 

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