All articles starting with M

Multivariate normal distribution

The multivariate normal distribution, also called the multivariate Gaussian, generalizes the normal distribution to random vectors of correlated variables, defined by a mean vector and covariance matrix.

Multivariate pattern analysis

Multivariate pattern analysis (MVPA) is a machine learning method that classifies mental states and stimuli from patterns of brain activity across many voxels, introduced by James V. Haxby in 2001.

Multivariate probit model

The multivariate probit model is a regression model for several correlated binary outcomes, introduced by Ashford and Sowden in 1970 and estimated by simulation or Bayesian methods.

Multivariate stable distribution

A multivariate stable distribution is a probability distribution of a random vector such that every linear combination of its coordinates follows a univariate stable distribution, generalizing the Gaussian and Cauchy laws.

Multivariate statistics

Multivariate statistics is the branch of statistics analyzing several variables measured on the same subjects simultaneously, using tools like principal component analysis, MANOVA, and discriminant analysis.

Multivector

A multivector is an element of a geometric algebra formed as a linear combination of blades of different grades, mixing scalars, vectors, and bivectors in one object.

Multiverse

The multiverse, also known as multiple universes, is the hypothetical collection of all universes, including our own, proposed in inflationary cosmology, quantum mechanics, and string theory.

Multiverse (company)

Multiverse, formerly WhiteHat, is a British technology and education company founded in London in 2016 by Euan Blair that delivers apprenticeships and workplace training in data, AI, and technology skills.

Multiverse (DC Comics)

DC Multiverse is the fictional collection of parallel universes used by DC Comics to organize over 80 years of superhero stories, featuring infinite Earth frequencies and realms for cosmic beings.

Multiverse (Marvel Cinematic Universe)

The multiverse of the Marvel Cinematic Universe: parallel universes and branching timelines linking Earth-616's Sacred Timeline with Sony Spider-Man and Fox X-Men films, central to the Multiverse Saga (Phases 4-6), incursions, Kang, Doctor Doom, Doomsday, and Secret Wars.

Multiverse (Marvel Comics)

The Marvel Comics multiverse is the fictional set of parallel universes, with Earth-616 as the main continuity, named by Dave Thorpe and Alan Moore in 1983, marked by What If...?, Secret Wars, incursions, and MCU adoption.

Multiverse analysis

Multiverse analysis is a statistical method that runs every reasonable combination of data-processing choices on one dataset, showing how robust a finding is to arbitrary researcher decisions.

Multiversion concurrency control

Multiversion concurrency control (MVCC) is a database concurrency control method in which each write creates a new version, so readers see a consistent snapshot and never block writers.

MultiVersus

MultiVersus: free-to-play Warner Bros. crossover platform fighter by Player First Games, also called MVS. Open beta 2022, relaunch May 2024, servers closed and game delisted May 30, 2025; now offline-only.

Multivibrator

A multivibrator is an electronic circuit of two inverting amplifier stages with positive feedback, producing non-sinusoidal waveforms; it takes astable, monostable, and bistable forms, the last being the flip-flop.

Multiview clustering

Multiview clustering (MVC) is an unsupervised machine learning method that groups data objects by combining several views, or representations, of the same objects, seeking clusterings consistent across views.

Multivisceral resection

Multivisceral resection (MVR) is a surgical oncology procedure in which a primary tumor and adjacent invaded organs are removed together en bloc to achieve clear margins.

Multivisceral transplantation

Multivisceral transplantation is a rare operation replacing the stomach, pancreas, and intestine en bloc in one graft, either including the liver (full) or leaving the native liver in place (modified).

Multivitamin

Multivitamin (multivitamin/mineral, MVM) supplements combine vitamins and minerals; no standard composition exists. First sold in the 1940s, taken by about a third of U.S. adults; evidence insufficient for preventing CVD or cancer, but pregnancy and cognitive benefits reported.

Multiwavelength anomalous dispersion

Multiwavelength anomalous dispersion (MAD), or multiwavelength anomalous diffraction, is an X-ray crystallography phasing method, devised by Wayne Hendrickson, that solves protein structures from a single crystal.

Multiway switching

Multiway switching, known in the US as a three-way switch circuit, controls a single light from two or more locations, as in hallways and stairways.

MultiWii

MultiWii is open-source autopilot firmware for multirotor model aircraft, developed by radio-control hobbyists to run on Arduino boards, with GPS position hold and return-to-home support.

Multiwinner approval voting

Multiwinner approval voting: methods where voters approve any number of candidates and a rule selects a fixed-size committee. Key rules include Proportional Approval Voting, Multi-Winner Approval Voting, and Approval Chamberlin–Courant, studied for proportionality, diversity, and strategy resistance.

MultiWOZ

MultiWOZ (Multi-Domain Wizard-of-Oz) is a fully labeled dataset of about 10,000 human-written task-oriented dialogues, released in 2018 and now a leading benchmark for dialogue state tracking.

Multnomah (steamboat)

Multnomah was a side-wheel steamboat on Oregon's Willamette and Columbia rivers, launched at Canemah in 1851 and the first steamer to ascend the Willamette to Corvallis.

Multnomah County, Oregon

Multnomah County, Oregon: Portland-seat county created December 22, 1854 as Oregon Territory's 13th county; smallest by area at 465 square miles, most populous of Oregon's 36 counties, governed by a home rule charter with a countywide Chair and four district commissioners.

Multnomah Falls

Multnomah Falls is a 620-foot two-tiered waterfall on Multnomah Creek in the Columbia River Gorge, Oregon, about 30 miles east of Portland and the state's tallest.