Definition:Real Vector Space
Definition
Let $\R$ be the set of real numbers.
Then the $\R$-module $\R^n$ is called the real ($n$-dimensional) vector space.
Also known as
A real vector space is also known as a real linear space.
Some sources refer to this as a real Euclidean space, based on the fact that $\R^2$ and $\R^3$ support Euclidean geometry.
However, this latter term is used on $\mathsf{Pr} \infty \mathsf{fWiki}$ in the context of metric spaces to define a real Cartesian space which has the Euclidean metric applied to it.
The constructs are in fact the same thing, but the emphasis is different.
Also see
 | This page has been identified as a candidate for refactoring of basic complexity. In particular: This section is too discursive Until this has been finished, please leave {{Refactor}} in the code.
New contributors: Refactoring is a task which is expected to be undertaken by experienced editors only. Because of the underlying complexity of the work needed, it is recommended that you do not embark on a refactoring task until you have become familiar with the structural nature of pages of $\mathsf{Pr} \infty \mathsf{fWiki}$.To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{Refactor}} from the code. |
This object is proved to be a vector space in Real Vector Space is Vector Space.
The definition is also expanded upon in Real Numbers form Vector Space.
The real vector spaces have direct applications to the real world. In fact, it could be suggested that they are the interface between mathematics and physical reality, as follows:
- From the definition of the real number line, the $\R$-vector space $\R$ is isomorphic to $\R$ to an infinite straight line.
- From the definition of the real number plane, the $\R$-vector space $\R^2$ is isomorphic to $\R$ to an infinite flat plane.
- The $\R$-vector space $\R^3$ can be shown (given appropriate assumptions about the nature of the universe) to be isomorphic to the spatial universe.
 | This article is complete as far as it goes, but it could do with expansion. In particular: It's also important to report that the real vector space is also a normed vector space as well You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by adding this information. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{Expand}} from the code.If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page. |
- Results about real vector spaces can be found here.
Sources
- 1955: John L. Kelley: General Topology ... (previous) ... (next): Chapter $0$: Algebraic Concepts
- 1965: Seth Warner: Modern Algebra ... (previous) ... (next): Chapter $\text {V}$: Vector Spaces: $\S 26$. Vector Spaces and Modules: Example $26.2$
- 1994: Martin J. Osborne and Ariel Rubinstein: A Course in Game Theory ... (previous) ... (next): $1.7$: Terminology and Notation
- 2008: David Joyner: Adventures in Group Theory (2nd ed.) ... (previous) ... (next): Chapter $2$: 'And you do addition?': $\S 2.1$: Functions: Definition $2.1.2$