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Frölicher space : ウィキペディア英語版
Frölicher space
In mathematics, Frölicher spaces extend the notions of calculus and smooth manifolds. They were introduced in 1982 by the mathematician Alfred Frölicher.
==Definition==
A Frölicher space consists of a non-empty set ''X'' together with a subset ''C'' of Hom(R, ''X'') called the set of smooth curves, and a subset ''F'' of Hom(''X'', R) called the set of smooth real functions, such that for each real function
:''f'' : ''X'' → R
in ''F'' and each curve
:''c'' : R → ''X''
in ''C'', the following axioms are satisfied:
# ''f'' in ''F'' if and only if for each ''γ'' in ''C'', ''f'' . ''γ'' in C(R, R)
# ''c'' in ''C'' if and only if for each ''φ'' in ''F'', ''φ'' . ''c'' in C(R, R)
Let ''A'' and ''B'' be two Frölicher spaces. A map
:''m'' : ''A'' → ''B''
is called ''smooth'' if for each smooth curve ''c'' in ''C''''A'', ''m''.''c'' is in ''C''''B''. Furthermore the space of all such smooth maps has itself the structure of a Frölicher space. The smooth functions on
''
:''C(''A'', ''B'')
are the images of
:S : F_B \times C_A \times \mathrm^(\mathbf, \mathbf)' \to \mathrm(\mathrm^(A, B), \mathbf) : (f, c, \lambda) \mapsto S(f, c, \lambda), \quad S(f, c, \lambda)(m) := \lambda(f \circ m \circ c)

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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