Where will you find mathematics of n spacial dimensions?

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Discussion Overview

The discussion centers around the exploration of mathematics in n spatial dimensions, particularly focusing on the properties of n-dimensional figures and the relevant mathematical subjects that encompass this topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant inquires about the terminology used for studying properties of n-dimensional figures and whether it falls under 'geometry in multiple dimensions'.
  • Another participant explains that mathematics often operates in an abstract number of dimensions, specifically mentioning R^n as a model for n-dimensional geometry.
  • It is suggested that differential geometry is relevant for understanding curved geometries where dependencies exist between dimensions.
  • Examples are provided to illustrate the difference between independent and dependent variables in n-dimensional spaces.
  • Linear algebra is identified as foundational for understanding fixed-dimensional theories, while Hilbert-Space theory is mentioned in relation to infinite-dimensional spaces, particularly in quantum mechanics.
  • Manifold theory is introduced as a general framework that includes differential geometry.
  • Vector calculus is recommended as a prerequisite for studying differential geometry.
  • A later reply suggests looking up higher-dimensional geometry or starting with linear algebra in n dimensions.

Areas of Agreement / Disagreement

Participants generally agree on the relevance of various mathematical fields such as linear algebra, differential geometry, and manifold theory in the study of n-dimensional spaces. However, there is no explicit consensus on a singular approach or terminology for the topic.

Contextual Notes

The discussion does not resolve the specific terminology for n-dimensional geometry and leaves open the question of how best to approach the study of these concepts.

Who May Find This Useful

Individuals interested in advanced mathematics, particularly those exploring geometry, linear algebra, and differential geometry, may find this discussion beneficial.

coeilsmicah
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For example, finding the properties of an n dimensional figure. Is this called something in math, or do I just refer to it as 'geometry in multiple dimensions'? What subjects can I find this topic under?
 
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Hey coeilsmicah and welcome to the forums.

Mathematics currently usually works in an abstract number of dimensions. For example R^n is the geometry that looks like normal 3D space but in n-dimensions where every component of the vector (in n-dimensions) can be changed without affecting any of the others.

You can read up on differential geometry which looks at general situations where geometry is curved (i.e. not like the one above): in other words, the geometry has a dependency.

As an example consider y = x + 2: y depends on x so it's not like changing x won't change y: it will change y. But consider x = 2, y = 1: we change x but y doesn't change.

The situation where we can change any element and it doesn't change any other, the main results of looking at these spaces can be found in linear algebra for the fixed dimension theory (i.e. n is finite) and for the infinite-dimensional theory (yes it exists and it's used for the theory of quantum mechanics) it's called Hilbert-Space theory.

Also you will need to learn vector calculus before differential geometry.

The general theory of geometric objects is known as manifold theory which encompasses a lot of differential geometry.

The differential geometry can be understood when you have taken enough calculus and some linear algebra and the idea used in tensor theory is to use the main concepts of geometry (distance and angle) and see how these things change between different co-ordinate systems: this way you can look at how deforming a co-ordinate system (i.e. treating like a play-doh thing where you can squish it and stretch it) changes its properties of distance and angle.

This is a highly simplified description, but hopefully it will help you.
 
look up higher dimensional geometry, or just start with linear algebra in n dimensions.
 
chiro and mathwonk,
Thank you guys for the kind replies, they really cleared up a lot. I'll be sure to shift my efforts to lean more toward studying calculus.
 

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