All articles A–Z
519,064 articles
Element of a set
An element of a set, also called a member, is an object that belongs to the set, written a ∈ A; membership is the basic relation of set theory.
Element UI
Element UI is an open-source component library for Vue.js 2.0 built by ele.me's frontend team, offering forms, tables, and dialogs for Vue 2 admin panels.
Element Ventures
Element Ventures was a London venture capital firm focused on B2B fintech, founded in 2018 by Steve Gibson and Michael McFadgen and later renamed 13books Capital.
Element-free Galerkin method
The element-free Galerkin method is a meshfree numerical technique for solving partial differential equations using moving least squares interpolants, introduced by Belytschko, Lu, and Gu in 1994.
Elemental
Elemental (also elemental being): a nature spirit associated with one of the four classical elements, classified by Paracelsus as gnomes, sylphs, salamanders, and undines; used in occultism, folklore, fiction, and design tools.
Elemental (2023 film)
Elemental (2023) is a Disney-Pixar animated romantic comedy-drama directed by Peter Sohn, set in Element City where fire, water, land and air residents live together; Ember (Leah Lewis) and Wade (Mamoudou Athie) lead a $496 million-grossing, Oscar-nominated immigration allegory.
Elemental Ai
Elemental AI is a family of Delaware-formed private investment funds, administered from Tortola in the British Virgin Islands, that raised over $530 million starting in 2025.
Elemental chlorine free
Elemental chlorine free (ECF) is a pulp bleaching method that replaces elemental chlorine with chlorine dioxide, eliminating most dioxin discharges; it dominates the bleached chemical pulp market.
Elemental Cognition
Elemental Cognition is a New York-based artificial intelligence company founded in 2015 by David Ferrucci, who led the IBM team that created Watson. It builds neuro-symbolic AI.
Elemental diet
An elemental diet is a liquid nutrition regimen whose protein comes as free amino acids, requiring almost no digestion and used in Crohn's disease and eosinophilic disorders.
Elemental iron
Elemental iron (CAS 7439-89-6) is metallic iron used principally to make steel, with specialized uses in food fortification and as an EU-approved low-risk molluscicide active substance since May 2025.
Elemental mapping
Elemental mapping is an analytical microscopy technique that scans an electron or X-ray beam across a sample to image where each chemical element sits, pixel by pixel.
Elementals (Marvel Comics)
The Elementals are a team of four nearly immortal extradimensional supervillains in Marvel Comics, Hellfire, Hydron, Magnum, and Zephyr, who control fire, water, earth, and air and first appeared in Supernatural Thrillers #8.
Elementary (TV series)
Elementary (CBS, 2012-2019) is an American crime drama reimagining Sherlock Holmes (Jonny Lee Miller) as a recovering-addict NYPD consultant with Dr. Joan Watson (Lucy Liu); seven seasons, 154 episodes, finale "Their Last Bow."
Elementary algebra
Elementary algebra, also known as college algebra or high school algebra, is the branch of mathematics that uses letters as variables to write and solve equations, taught in school and introductory college courses.
Elementary and Secondary Education Act
Elementary and Secondary Education Act (ESEA), 1965 US federal law (P.L. 89-10) providing the first general federal K-12 aid, whose Title I funds disadvantaged students; reauthorized by NCLB 2001 and ESSA 2015.
Elementary charge
The elementary charge, symbol e, is the magnitude of the charge carried by a single electron or proton, fixed exactly at 1.602176634 × 10⁻¹⁹ coulombs in the SI since 2019.
Elementary Data
Elementary Data (elementary-data.com) is a Tel Aviv-based data observability company founded in 2021 by Or Avidov and Maayan Salom, YC W22, offering an open-source dbt-native observability package and Elementary Cloud; acquired by Boomi in October 2026.
Elementary equivalence
Elementary equivalence, or elementarily equivalent structures, is a relation between structures of the same first-order language that satisfy exactly the same first-order sentences, formulated by Alfred Tarski in 1930.
Elementary function
An elementary function is a function built by repeated composition from constants, addition, multiplication, division, root extraction, and algebraic, exponential, logarithmic, and trigonometric functions and their inverses.
Elementary matrix
An elementary matrix, or elementary matrices collectively, is a square matrix made from the identity by one row operation: a swap, a scaling, or a row addition.
Elementary OS
elementary OS is a design-oriented, beginner-friendly Linux distribution based on Ubuntu's long-term support releases, built around the custom Pantheon desktop and the pay-what-you-can AppCenter store, first released in 2011.
Elementary particle
An elementary particle, also called a fundamental particle, is a particle not made of simpler parts. In the Standard Model these include quarks, leptons, gauge bosons, and the Higgs boson.
Elementary reaction
An elementary reaction is a chemical reaction occurring in a single step through a single transition state, and elementary steps form a complex reaction's mechanism.
Elementary symmetric polynomial
An elementary symmetric polynomial σₖ is the sum of all products of k distinct variables x₁, ..., xₙ; by the fundamental theorem, every symmetric polynomial is uniquely a polynomial in them, a fact underlying Vieta's formulas.
Elementis
Elementis plc is a British specialty chemicals company producing hectorite-based rheology modifiers for coatings, personal care, and energy, listed on the London Stock Exchange in the FTSE 250.
Elements (Jihe Yuanben)
Elements, or Jihe Yuanben (几何原本), is the first Chinese translation of Euclid's Elements, begun by Matteo Ricci and Xu Guangqi in the Wanli era and completed by Li Shanlan and Alexander Wylie.
Éléments de mathématique
Éléments de mathématique is a treatise on mathematics by Nicolas Bourbaki, a largely French collective, rebuilding modern mathematics axiomatically in ten books across roughly forty volumes.
Elements of AI
Elements of AI is a series of free online courses on artificial intelligence created by MinnaLearn, formerly Reaktor, and the University of Helsinki, with over 1.4 million students.
Elements of art
Elements of art: the visual building blocks (line, shape, form, space, color, value, texture) used in formal analysis and art education, paired with the principles of design; lists vary by institution.