Nabla is a symbol, shown as . The name comes from the Greek word for a Hebrew harp with a similar shape. Related words also exist in Aramaic and Hebrew. The harp is a stringed instrument which has its strings positioned perpendicular to the soundboard. ... Aramaic is a Semitic language with a 3,000-year history. ... Hebrew (עִבְרִית ‘Ivrit) is a Semitic language of the Afro-Asiatic language family spoken by more than seven million people in Israel and Jewish communities around the world. ...

Another, less-common name for the symbol is atled, because it is a reversed delta. For other uses, see Delta. ...

The nabla symbol is available in standard HTML as ∇ and in LaTeX as nabla. In Unicode, it is the character at decimal number 8711, or the hexadecimal number 0x2207. LATEX, written as LaTeX in plain text, is a document preparation system for the TeX typesetting program. ... Due to technical limitations, some web browsers may not display some special characters in this article. ... The decimal (base ten or occasionally denary) numeral system has ten as its base. ... A number is an abstract entity that represents a count or measurement. ... In mathematics and computer science, base-16, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ...

Nabla is used in mathematics to denote the del operator. It also can refer to a connection in differential geometry. It was introduced by the Irish mathematician and physicist William Rowan Hamilton in 1837. Euclid, detail from The School of Athens by Raphael. ... In vector calculus, del is a vector differential operator represented by the nabla symbol, ∇. In the three-dimensional Cartesian coordinate system R3 with coordinates (x, y, z), del can be defined as or alternatively, where is the standard basis in R3. ... In differential geometry, a connection (also connexion) or covariant derivative is a way of specifying a derivative of a vector field along another vector field on a manifold. ... In mathematics, differential topology is the field dealing with differentiable functions on differentiable manifolds. ... William Rowan Hamilton Sir William Rowan Hamilton (August 4, 1805 – September 2, 1865) was an Irish mathematician, physicist, and astronomer who made important contributions to the development of optics, dynamics, and algebra. ... | Queen Victoria, Queen of the United Kingdom (1837 - 1901) 1837 was a common year starting on Sunday (see link for calendar). ...

See also Nabla in cylindrical and spherical coordinates. This is a list of some vector calculus formulae of general use in working with standard coordinate systems. ...