The equation of time describes the discrepancy between two kinds of solar time. The word equation is used in the medieval sense of "reconciliation of a...

The Schrödinger equation is a linear partial differential equation that governs the wave function of a quantum-mechanical system.: 1–2  Its discovery was...

theory, Kolmogorov equations, including Kolmogorov forward equations and Kolmogorov backward equations, characterize continuous-time Markov processes....

heat equation is a certain partial differential equation. Solutions of the heat equation are sometimes known as caloric functions. The theory of the heat...

correction—which may be as great as 16 minutes, 33 seconds—is described by the equation of time. A sophisticated sundial, with a curved style or hour lines, may incorporate...

GMT, a discrepancy described by the equation of time. Noon GMT is the annual average (the arithmetic mean) moment of this event, which accounts for the...

equation or sunset equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar time when...

equations are used to describe the time evolution of a system that can be modeled as being in a probabilistic combination of states at any given time...

Schrödinger equation containing only the 36 coordinates of the nuclei. So, taking the most optimistic estimate for the complexity, instead of a large equation requiring...

clock. Since the main effect of this oscillation concerns time, it is called the equation of time, using the word "equation" in a somewhat archaic sense...

mean time and local apparent time is the equation of time. Local mean time was used from the early 19th century, when local solar time or sundial time was...

An equation clock is a mechanical clock which includes a mechanism that simulates the equation of time, so that the user can read or calculate solar time...

Functional equation Functional equation (L-function) Constitutive equation Laws of science Defining equation (physical chemistry) List of equations in classical...

A continuity equation or transport equation is an equation that describes the transport of some quantity. It is particularly simple and powerful when...

The wave equation is a second-order linear partial differential equation for the description of waves or standing wave fields such as mechanical waves...

problems, the analogous equation is a partial differential equation that is called the Hamilton–Jacobi–Bellman equation. In discrete time any multi-stage optimization...

equation, a symbolic representation of a chemical reaction Equation of time, the difference between solar time, as shown by a sundial, and mean time,...

mean time is ahead of apparent time by about 14 minutes near February 6, and behind apparent time by about 16 minutes near November 3. The equation of time...

Equation of time International Atomic Time Ist (disambiguation page) John Goldingham Railway time in India Sri Lanka Standard Time Terrestrial Time Time...

In mathematics, time-scale calculus is a unification of the theory of difference equations with that of differential equations, unifying integral and differential...

Fokker–Planck equation is a partial differential equation that describes the time evolution of the probability density function of the velocity of a particle...

The Navier–Stokes equations (/nævˈjeɪ stoʊks/ nav-YAY STOHKS) are partial differential equations which describe the motion of viscous fluid substances...

differential equations (PDEs) in both space and time. The Helmholtz equation, which represents a time-independent form of the wave equation, results from...

rates of change, and the differential equation defines a relationship between the two. Such relations are common; therefore, differential equations play...

observer's longitude, the local civil time, and the equation of time must be taken into account. The moment of the Sun's closest approach to the horizon...

pre-corrected for the equation of time on the date of observation, to form local mean solar time. Noon occurred at different times but time differences between...

linear dynamical systems. In particular, the discrete-time Lyapunov equation (also known as Stein equation) for X{\displaystyle X} is AXAH−X+Q=0{\displaystyle...

The convection–diffusion equation is a combination of the diffusion and convection (advection) equations, and describes physical phenomena where particles...

Globes of Earth often display an analemma as a two-dimensional figure of equation of time vs. declination of the Sun. The north–south component of the analemma...

equation or Bateman–Burgers equation is a fundamental partial differential equation and convection–diffusion equation occurring in various areas of applied...