Difference between revisions of "Self-similarity"
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In mathematics, a self-similar object is exactly or approximately similar to a part of itself (i.e. the whole has the same shape as one or more of the parts).
Description
Many objects in the real world, such as coastlines, are statistically self-similar: parts of them show the same statistical properties at many scales.
Self-similarity is a typical property of fractals.
Scale invariance is an exact form of self-similarity where at any magnification there is a smaller piece of the object that is similar to the whole. For instance, a side of the Koch snowflake is both symmetrical and scale-invariant; it can be continually magnified 3x without changing shape.
The non-trivial similarity evident in fractals is distinguished by their fine structure, or detail on arbitrarily small scales.
As a counterexample, whereas any portion of a straight line may resemble the whole, further detail is not revealed.
See also
External links
- Self-similarity @ Wikipedia
