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・ Symmetrischema tangolias
・ Symmetrischema ventralella
・ Symmetrix Remote Data Facility
・ Symmetrizable compact operator
・ Symmetrization
・ Symmetrization methods
・ Symmetrocapulidae
・ Symmetroctena
・ Symmetrodes
・ Symmetrodes platymelas
・ Symmetrodes sciocosma
・ Symmetrodonta
・ Symmetromphalus
・ Symmetromphalus hageni
・ Symmetromphalus regularis
Symmetry
・ Symmetry (band)
・ Symmetry (disambiguation)
・ Symmetry (film)
・ Symmetry (Gabriella Cilmi song)
・ Symmetry (geometry)
・ Symmetry (horse)
・ Symmetry (physics)
・ Symmetry breaking
・ Symmetry breaking and cortical rotation
・ Symmetry breaking of escaping ants
・ Symmetry Electronics
・ Symmetry element
・ Symmetry group
・ Symmetry group (disambiguation)


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Symmetry : ウィキペディア英語版
Symmetry


Symmetry (from Greek συμμετρία ''symmetria'' "agreement in dimensions, due proportion, arrangement")〔(【引用サイトリンク】url=http://www.etymonline.com/index.php?term=symmetry )〕 in everyday language refers to a sense of harmonious and beautiful proportion and balance. In mathematics, "symmetry" has a more precise definition, that an object is invariant to a transformation, such as reflection but including other transforms too. Although these two meanings of "symmetry" can sometimes be told apart, they are related, so they are here discussed together.
Mathematical symmetry may be observed with respect to the passage of time; as a spatial relationship; through geometric transformations such as scaling, reflection, and rotation; through other kinds of functional transformations; and as an aspect of abstract objects, theoretic models, language, music and even knowledge itself.
This article describes symmetry from three perspectives: in mathematics, including geometry, the most familiar type of symmetry for many people; in science and nature; and in the arts, covering architecture, art and music.
The opposite of symmetry is asymmetry.
==In mathematics==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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