Wavefunction collapse is the mechanism in which a system, by interacting with its environ- ment (which includes a measuring apparatus), is transformed from a superposition of states into a definite (classical) state with a well-defined value of a given measurable quantity.

Wave function collapse is a algorithm that can procedurally generate images, text, audio and almost anything that follows a pattern of a simple set of initial parameters and a set of rules.

A live cat goes in the box. The cat knows it is alive. From the cat's point of view, the wavefunction has collapsed and the atom has not decayed. From the human's point of view, outside the box, the wavefunction has not collapsed and the cat might be alive or dead.

Relativistic collapse models The biggest difficulty is how to combine the nonlocal character of the collapse, which is necessary in order to make it compatible with the experimentally verified violation of Bell inequalities, with the relativistic principle of locality.