A basis function is a fundamental component in various fields such as mathematics, statistics, and machine learning. It serves as a building block for constructing more complex functions or representations. Here are some key points about basis functions: 1. **Mathematical Definition**: In the context of functional analysis, a set of functions is considered a basis if any function in a certain function space can be expressed as a linear combination of those basis functions.
Module theory is a branch of abstract algebra that generalizes the concept of vector spaces to a more general setting. In module theory, the scalars are elements of a ring, rather than a field. This enables the study of algebraic structures where the operations can be more diverse than those defined over fields. ### Key Concepts: 1. **Modules**: A module over a ring \( R \) is a generalization of a vector space.
In linear algebra, a theorem is a statement that has been proven to be true based on previously established statements, such as other theorems, axioms, and definitions. Theorems help to illustrate fundamental concepts about vector spaces, matrices, linear transformations, and related structures.
The Amitsur–Levitzki theorem is a result in the field of functional analysis and algebra, specifically relating to the theory of multi-linear forms and polynomial identities. It provides a characterization of certain types of algebras, specifically focusing on the representation theory of non-commutative algebras.
The term "angles between flats" typically refers to the angles formed between two flat surfaces, or "flats," in a three-dimensional space. This concept is often relevant in fields such as geometry, engineering, and architecture, where the orientation of surfaces relative to one another is important.
An antiunitary operator is a type of linear operator that is an essential concept in quantum mechanics and quantum information theory. It has properties that distinguish it from unitary operators, which are commonly associated with the evolution of quantum states.
The term "balanced set" can refer to different concepts in various fields, but it often implies a situation or collection that is equalized or organized in a way that maintains fairness or proportionality. Here are a few contexts in which the term might be used: 1. **Mathematics and Statistics**: In statistics, a balanced set may refer to a data set where the distribution of categories or groups is even.
In the context of module theory, which is a branch of abstract algebra, the direct sum of modules is a way to combine two or more modules into a new module.
The entanglement-assisted stabilizer formalism is a framework used in quantum error correction and quantum information theory that combines the concepts of stabilizer codes with the use of entanglement to enhance their capabilities. Here's an overview of its key features: ### **Stabilizer Codes** Stabilizer codes are a class of quantum error-correcting codes that can efficiently protect quantum information against certain types of errors.
A Cartesian tensor, also known as a Cartesian coordinate tensor, is a mathematical object used in the field of physics and engineering to describe physical quantities in a way that is independent of the choice of coordinate system, as long as that system is Cartesian. In three-dimensional space, a Cartesian tensor can be represented with respect to a Cartesian coordinate system (x, y, z) and is described by its components.
The Cauchy–Schwarz inequality is a fundamental inequality in mathematics, particularly in linear algebra and analysis.
The characteristic polynomial is a polynomial that is derived from a square matrix and is used in linear algebra to provide important information about the matrix, particularly its eigenvalues.
A linear combination is a mathematical expression constructed from a set of elements, typically vectors or functions, where each element is multiplied by a coefficient (a scalar, which can be any real or complex number) and then summed together.
Combinatorial matrix theory is a branch of mathematics that studies matrices through the lens of combinatorial concepts. This field combines elements from linear algebra, combinatorics, and graph theory to analyze the properties and structures of matrices, particularly focusing on their combinatorial aspects. Some of the key features and areas of study in combinatorial matrix theory include: 1. **Matrix Representations of Graphs**: Many combinatorial structures can be represented using matrices.
In the context of field extensions, the concept of a "dual basis" typically applies within the framework of vector spaces and linear algebra.
The Frobenius normal form, also known as the Frobenius form or the rational canonical form, is a specific way to represent a linear transformation or a matrix that highlights its structure in a form that can be easily understood and analyzed, particularly regarding information about its eigenvalues and invariant factors.
A glossary of linear algebra typically includes key terms and concepts that are fundamental to the study and application of linear algebra. Here’s a list of some important terms you might find in such a glossary: ### Glossary of Linear Algebra 1. **Vector**: An element of a vector space; often represented as a column or row of numbers. 2. **Matrix**: A rectangular array of numbers arranged in rows and columns.
Compressed sensing (CS) is a technique in signal processing that enables the reconstruction of a signal from a small number of samples. It leverages the idea that many signals are sparse or can be sparsely represented in some basis, meaning that they contain significant information in far fewer dimensions than they are originally represented in. ### Key Concepts of Compressed Sensing: 1. **Sparsity**: A signal is considered sparse if it has a representation in a transformed domain (e.g.
Pinned article: ourbigbook/introduction-to-the-ourbigbook-project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. - Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact