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Titlebook: Categories for the Working Mathematician; Saunders Mac Lane Textbook 19711st edition Springer Science+Business Media New York 1971 Adjoint

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书目名称Categories for the Working Mathematician
编辑Saunders Mac Lane
视频videohttp://file.papertrans.cn/223/222540/222540.mp4
丛书名称Graduate Texts in Mathematics
图书封面Titlebook: Categories for the Working Mathematician;  Saunders Mac Lane Textbook 19711st edition Springer Science+Business Media New York 1971 Adjoint
描述Category Theory has developed rapidly. This book aims to present those ideas and methods which can now be effectively used by Mathe­ maticians working in a variety of other fields of Mathematical research. This occurs at several levels. On the first level, categories provide a convenient conceptual language, based on the notions of category, functor, natural transformation, contravariance, and functor category. These notions are presented, with appropriate examples, in Chapters I and II. Next comes the fundamental idea of an adjoint pair of functors. This appears in many substantially equivalent forms: That of universal construction, that of direct and inverse limit, and that of pairs offunctors with a natural isomorphism between corresponding sets of arrows. All these forms, with their interrelations, are examined in Chapters III to V. The slogan is "Adjoint functors arise everywhere". Alternatively, the fundamental notion of category theory is that of a monoid -a set with a binary operation of multiplication which is associative and which has a unit; a category itself can be regarded as a sort of general­ ized monoid. Chapters VI and VII explore this notion and its generaliza­ ti
出版日期Textbook 19711st edition
关键词Adjoint functor; Categories; Coproduct; algebra; category theory; colimit; equalizer; semigroup; transformat
版次1
doihttps://doi.org/10.1007/978-1-4612-9839-7
isbn_ebook978-1-4612-9839-7Series ISSN 0072-5285 Series E-ISSN 2197-5612
issn_series 0072-5285
copyrightSpringer Science+Business Media New York 1971
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Adjoints,s. As motivation, we first reexamine the construction (§III.1) of a vector space . with basis .. For a fixed field . consider the functors . where, for each vector space W, U(W) is the set of all vectors in ., so that . is the forgetful functor, while, for any set ., .(.) is the vector space with basis ..
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Daniele Di Castro,Giuseppe Balestrino of arrows. Each arrow .: . → . represents a function; that is, a set ., a set ., and a rule . ↦ . which assigns to each element . ∈ . an element . ∈ .; whenever possible we write . and not .(.), omitting unnecessary parentheses.
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Daniele Di Castro,Giuseppe Balestrinoctor, or as universal elements of a set-valued functor. Each universal determines a representation of a corresponding set-valued functor as a hom-functor. Such representations, in turn, are analyzed by the Yoneda Lemma. Limits are an important example of universals — both the inverse limits (= proje
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Soumaya Yacout,Vahid Ebrahimipours. As motivation, we first reexamine the construction (§III.1) of a vector space . with basis .. For a fixed field . consider the functors . where, for each vector space W, U(W) is the set of all vectors in ., so that . is the forgetful functor, while, for any set ., .(.) is the vector space with ba
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