deltás

Delta is a term with multiple meanings depending on the context. In geography, a delta refers to a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or standing water. This typically occurs where a river enters an ocean, sea, estuary, lake, or another river. Deltas are often triangular in shape, resembling the Greek letter delta (Δ), which is where the name originates. Examples include the Nile Delta and the Mississippi River Delta.

In mathematics, particularly in calculus, delta (Δ) is commonly used to represent a change in a variable. For instance, Δx signifies the change in the value of x. This notation is fundamental in defining concepts like derivatives and limits.

In physics, delta particles (Δ) are a type of baryon, which are subatomic particles composed of three quarks. Specifically, delta baryons are made of two quarks and one antiquark, or in more common simplified explanations, they are an excited state of a nucleon. They are short-lived and decay rapidly into other particles like pions and nucleons.

The term also appears in other fields. In statistics, delta methods are used for approximating the variance of a function of random variables. In engineering, delta connections are a way of connecting the windings of a three-phase electrical machine. The specific meaning of "delta" is always determined by the subject matter being discussed.