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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.
Delta (/ ˈ d ɛ l t ə / DEL-tə; [1] uppercase Δ, lowercase δ; Greek: δέλτα, délta, ) [2] is the fourth letter of the Greek alphabet. In the system of Greek numerals , it has a value of four.
Delta Delta Delta was founded by Sarah Ida Shaw, Eleanor Dorcas Pond, Florence Isabelle Stewart, and Isabel Morgan Breed at Boston University. [2] Three women's fraternities were already represented at Boston University (Kappa Kappa Gamma, Gamma Phi Beta, and Alpha Phi). Shaw enlisted the help of Dorcas Pond, stating, "Let us found a society ...
Symbol Name Meaning SI unit of measure nabla dot the divergence operator often pronounced "del dot" per meter (m −1) nabla cross the curl operator often pronounced "del cross" per meter (m −1) nabla: delta (differential operator)
the symbol ϖ, a graphic variant of π, is sometimes construed as omega with a bar over it; see π; the unsaturated fats nomenclature in biochemistry (e.g. ω−3 fatty acids) the first uncountable ordinal (also written as Ω) the clique number (number of vertices in a maximum clique) of a graph in graph theory [85]
Nabla symbol (), an inverted delta representing del, a vector differential operator; Kronecker delta (), a function; Dirac delta (()), a function, a triangle defined by points A, B and C (ε, δ)-definition of limit
For most symbols, the entry name is the corresponding Unicode symbol. So, for searching the entry of a symbol, it suffices to type or copy the Unicode symbol into the search textbox. Similarly, when possible, the entry name of a symbol is also an anchor, which allows linking easily from another Wikipedia article. When an entry name contains ...
The Eye of Providence can be found on the reverse of the Great Seal of the United States, as seen on the U.S. $1 bill, depicted here.. The Eye of Providence or All-Seeing Eye is a symbol depicting an eye, often enclosed in a triangle and surrounded by rays of light or a halo, intended to represent Providence, as the eye watches over the workers of mankind.