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The nabla is a triangular symbol resembling an inverted Greek delta: [1] or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word νάβλα for a Phoenician harp, [2] [3] and was suggested by the encyclopedist William Robertson Smith in an 1870 letter to Peter Guthrie Tait.
the nabla symbol. Del, or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by the nabla symbol ∇. When applied to a function defined on a one-dimensional domain, it denotes the standard derivative of the function as defined in calculus.
This page is subject to the extended confirmed restriction related to the Arab-Israeli conflict. An inverted red triangle Since the Israeli invasion of the Gaza Strip, an inverted red triangle has been used by pro-Palestinian protesters. The red triangle as a Palestinian symbol dates back to the Arab Revolt, after which it was also used in the Palestinian flag. More recently, combat footage ...
3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.
The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics. Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, [1] and the LaTeX symbol.
A 1974 Supreme Court decision upheld the right to display a flag upside down after a university student was accused of violating state law by hanging a flag upside down with peace symbols affixed ...
A symbol on the Brazilian state flag of Minas Gerais; Red triangle (Channel 4), British television content warning system symbol; Red Triangle (family planning), the symbol for family planning health and contraception services; Red triangle (Palestinian symbol), a symbol used by the Palestinian militant group Hamas and pro-Palestinian protesters
the population mean or expected value in probability and statistics; a measure in measure theory; micro-, an SI prefix denoting 10 −6 (one millionth) Micrometre or micron (retired in 1967 as a standalone symbol, replaced by "μm" using the standard SI meaning) the coefficient of friction in physics; the service rate in queueing theory