Business card wiki:
formal introductions as a convenience and a memory aid. A business card typically includes the giver's name, company affiliation (usually with a logo) and contact information such as street addresses, telephone number(s) and/or e-mail addresses. A professional business card will often (but not always) include one or more aspects of striking visual design.
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Commercial wiki:
mercial may mean refer to:as a noun: a form of advertising, as in a television commercialas an adjective: referring to commerce or for-profit activities or trade (compare with non-profit organization)commercial a form of land usea breed of cattle, Commercial cattlelist of television commercialsinfomercial
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Gradient wiki:
[or%20calculus">vector calculus, the gradient of a scalar field is a vector field which points in the direction of the greatest rate of increase of the scalar field, and whose magnitude is the greatest rate of change. More rigorously, the gradient of a function from the Euclidean space Rn to R is the best linear approximation to that function at any particular point in Rn. To that extent, the gradient is a particular case of the Jacobian.
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