Symmetric group - Wikipedia

Symmetric group - Wikipedia:



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Group action - Wikipedia

Group action - Wikipedia: "Actions of groups on vector spaces are called representations of the group."



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Representation of a Lie group - Wikipedia

Representation of a Lie group - Wikipedia: "If a basis for the complex vector space V is chosen, the representation can be expressed as a homomorphism into general linear group GL(n,C). This is known as a matrix representation.
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Symmetry (physics) - Wikipedia

Symmetry (physics) - Wikipedia: "A family of particular transformations may be continuous (such as rotation of a circle) or discrete (e.g., reflection of a bilaterally symmetric figure, or rotation of a regular polygon). Continuous and discrete transformations give rise to corresponding types of symmetries. Continuous symmetries can be described by Lie groups while discrete symmetries are described by finite groups (see Symmetry group).
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Online Etymology Dictionary

Online Etymology Dictionary: "bungled scribal transliterations of Arabic samt"



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Group homomorphism - Wikipedia

Group homomorphism - Wikipedia: "Types of group homomorphism[edit]
Monomorphism
A group homomorphism that is injective (or, one-to-one); i.e., preserves distinctness.
Epimorphism
A group homomorphism that is surjective (or, onto); i.e., reaches every point in the codomain.
Isomorphism
A group homomorphism that is bijective; i.e., injective and surjective. Its inverse is also a group homomorphism. In this case, the groups G and H are called isomorphic; they differ only in the notation of their elements and are identical for all practical purposes.
Endomorphism
A homomorphism, h: G → G; the domain and codomain are the same. Also called an endomorphism of G.
Automorphism"



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年・月・日の干支(No.0020)

A good result from googling '干支日付'

年・月・日の干支(No.0020):



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