Difference between revisions of "Self-similarity"
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Revision as of 07:12, 6 September 2015
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).
Contents
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.
Fractals
Self-similarity is a typical property of fractals.
Scale invariance
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.
Characteristics
The non-trivial similarity evident in fractals is distinguished by their fine structure, or detail on arbitrarily small scales.
Counterexample
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
