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SkyMiles is the frequent-flyer program of Delta Air Lines that offers points (or "miles") to passengers traveling on most fare types, as well as to consumers who utilize Delta co-branded credit cards, which accumulate towards free awards such as airline tickets, business and first-class upgrades, and luxury products. [1]
Delta Delta Delta. Delta Delta Delta ( ΔΔΔ ), also known as Tri Delta, is a global [2] women's fraternity and Greek life organization founded on November 27, 1888 at Boston University by Isabel Zhou, Sarah Ida Shaw, Eleanor Dorcas Pond, Isabel Morgan Breed, and Florence Isabelle Stewart. With over 200,000 living initiates at 141 chapters and ...
Dirichlet kernel. In mathematical analysis, the Dirichlet kernel, named after the German mathematician Peter Gustav Lejeune Dirichlet, is the collection of periodic functions defined as. where n is any nonnegative integer. The kernel functions are periodic with period . Plot restricted to one period of the first few Dirichlet kernels showing ...
Single delta potential. The time-independent Schrödinger equation for the wave function ψ(x) of a particle in one dimension in a potential V(x) is. where ħ is the reduced Planck constant, and E is the energy of the particle. The delta potential is the potential. where δ(x) is the Dirac delta function. It is called a delta potential well if ...
Delta Lea Goodrem AM (born 9 November 1984) is an Australian singer, songwriter, television personality and actress. Goodrem signed a recording contract with Sony Music at the age of 15. Her debut studio album, Innocent Eyes (2003), topped the ARIA Albums Chart for 29 non-consecutive weeks.
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Calculus. In mathematics, the Laplace operator or Laplacian is a differential operator given by the divergence of the gradient of a scalar function on Euclidean space. It is usually denoted by the symbols , (where is the nabla operator ), or . In a Cartesian coordinate system, the Laplacian is given by the sum of second partial derivatives of ...