A squared triangular number is a special type of number that is both a triangular number and a perfect square. A triangular number is a number that can form an equilateral triangle. The \( n \)-th triangular number is given by the formula: \[ T_n = \frac{n(n + 1)}{2} \] A perfect square is an integer that is the square of an integer.
Monomial order is a method used to arrange or order monomials (single-term polynomials) based on specific criteria. In the context of polynomial algebra and computational algebra, the order of monomials plays an important role, particularly in polynomial division, Gröbner bases, and algebraic geometry.
Giambelli's formula is a mathematical formulation used to compute the roots of a polynomial, specifically for polynomial equations of degree \( n \) expressed in the form: \[ P(x) = a_n x^n + a_{n-1} x^{n-1} + \ldots + a_1 x + a_0 \] The formula provides a way to express the roots of the polynomial in terms of its coefficients and is particularly useful in the context of the theory
The Von Neumann paradox, also known as the "Von Neumann architecture paradox," is a concept in the field of game theory and economics, particularly in the context of decision-making and self-referential systems. However, there is another related concept often referred to as the "paradox of choice" in decision-making processes.
Kostka polynomials are combinatorial objects that arise in the representation theory of the symmetric group and in the study of symmetric functions. They serve as a bridge between different bases of the ring of symmetric functions, particularly the Schur functions and the monomial symmetric functions.
Plethystic substitution is a concept from the field of algebra, specifically in the context of symmetric functions and combinatorial algebra. It is a generalization of the classical notion of substitution in polynomials and symmetric functions. In mathematical terms, plethystic substitution allows one to substitute a polynomial or power sum of variables into a symmetric function, typically a generating function. The key idea is to transform one kind of function into another while preserving certain structural properties.
The "annuity puzzle" refers to the phenomenon where many individuals, particularly those approaching retirement, do not purchase annuities despite the theoretical advantages of doing so. An annuity is a financial product that provides a stream of income, typically for the rest of a person’s life, in exchange for an initial lump sum payment. The puzzle arises from the observation that, according to economic theory, rational individuals should value the security and reduction in longevity risk that annuities offer (i.e.
A Private Annuity Trust (PAT) is a financial instrument used primarily in estate planning and wealth transfer strategies. It allows an individual, usually a property owner or a business owner, to transfer assets into a trust while receiving an income stream from those assets for the rest of their life, or for a specified period.
UCLUST is a software tool commonly used in bioinformatics for clustering sequences, particularly in the analysis of large datasets of DNA or protein sequences. It is part of the Qiime (Quantitative Insights Into Microbial Ecology) software suite, which is designed for analyzing and interpreting microbial communities. UCLUST groups sequences based on similarity levels, allowing researchers to identify distinct operational taxonomic units (OTUs) from metagenomic data.
A pseudorandom generator, or pseudorandom number generator (PRNG), is an algorithm that produces a sequence of numbers that appear to be random but are actually generated in a deterministic manner. Unlike true random number generators, which derive randomness from physical processes (like thermal noise or radioactive decay), PRNGs use mathematical functions to generate sequences of numbers based on an initial value known as a "seed.
The Time-Weighted Average Price (TWAP) is a trading algorithm used to execute orders over a specified time period while minimizing market impact. It is often employed by institutional investors or traders aiming to buy or sell large quantities of securities without significantly influencing the market price. TWAP is calculated as the average price of a security over a specific time interval, weighted by the amount of time each price was in effect.
The Wagner–Fischer algorithm is a well-known dynamic programming approach for computing the Levenshtein distance between two strings. The Levenshtein distance is a measure of how many single-character edits (insertions, deletions, or substitutions) are needed to transform one string into another. This algorithm efficiently builds a matrix that represents the cost of transforming prefixes of the first string into prefixes of the second string.
Domination analysis is a technique used primarily in the context of decision-making, optimization, and game theory. It helps assess the performance of different solutions or strategies by analyzing the conditions under which one option can be said to "dominate" another.
The GNRS conjecture is a conjecture in mathematics related to the theory of numbers. It specifically deals with properties of certain types of polynomials and their roots. The conjecture is named after mathematicians G. N. Reddy, M. A. N. Saidi, and I. A. S. R. N. S.
The Karloff–Zwick algorithm is a randomized algorithm used to approximate the solution to the Max-Cut problem, which is the problem of partitioning the vertices of a graph into two disjoint subsets such that the number of edges between the subsets is maximized. This is a well-known NP-hard problem in combinatorial optimization. Karloff and Zwick presented this algorithm in their research to offer a way to approximate Max-Cut using a probabilistic method.

Pinned article: 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!
We have two killer features:
  1. 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-calculus
    Articles 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/derivative
  2. 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.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . 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.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
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