The Fly is a 1986 American science fiction horror film directed and co-written by David Cronenberg. Produced by Brooksfilms and distributed by 20th Century Fox, the film stars Jeff Goldblum, Geena Davis and John Getz. Loosely based on George Langelaan's 1957 short story of the same name, the film tells of an eccentric scientist who, after one of his experiments goes wrong, slowly turns into a fly-hybrid creature. The score was composed by Howard Shore and the make-up effects were created by Chris Walas, along with makeup artist Stephan Dupuis. The film was released on August 15, 1986 to massive...

In mathematics, a weak derivative is a generalization of the concept of the derivative of a function (strong derivative) for functions not assumed differentiable, but only integrable, i.e. to lie in the Lp space L 1 ( [ a , b ] ) {\displaystyle \mathrm {L} ^{1}([a,b])} . See distributions for an even more general definition. == Definition == Let u {\displaystyle u} be a function...

In differential geometry, a tensor density or relative tensor is a generalization of the tensor concept. A tensor density transforms as a tensor when passing from one coordinate system to another (see classical treatment of tensors), except that it is additionally multiplied or weighted by a power W of the Jacobian determinant of the coordinate transition function or its absolute value. A distinction is made among (authentic) tensor densities, pseudotensor densities, even tensor densities and odd tensor densities. Sometimes tensor densities with a negative weight W are called tensor capacity. A...