Generally speaking, patterns can be detected or recognized by people (or in some cases, by computers).
Patterns may be observable through the senses.
Some patterns are named. Examples include the regular tiling of a plane[?], echoes, and balanced binary branching.
Fractals are mathematical patterns. Naturally occuring patterns obey certain principles also found in fractals, for example selfsimilarity. Even though selfsimilarity in nature is only approximate and stochastic, integral measures describing fractal properties can also be applied to natural "fractals" like coastal lines, tree shapes, etc. (see fractal geometry). While the outer appearance of selfsimilar patterns can be quite complex, the rules needed to describe or produce their formation[?] can be extremely simple (e.g. Lindenmayer systems for the description of tree shapes).
In addition to static patterns there may be patterns of movement such as oscillation.

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