扩张维数与拟有限CW-复形
Extension dimension and quasi-finite CW-complexes
摘要:
我们通过考虑不一定可数的复形来扩展准有限复形的定义。我们利用L-可逆映射和紧化的维数性质给出了拟有限复形的一个刻画。建立了与拟有限复形类相关的几个结果,如可度量化空间的完备化、泛空间的存在性和因子分解定理的一个版本。进一步,我们推广了UV(L)-空间在非紧情形下的定义,并证明了UV(n)-空间和UV(n)-映射的一些性质分别对UV(L)-空间和UV(L)-映射仍然成立。
英文摘要:
We extend the definition of quasi-finite complexes by considering not necessarily countable complexes. We provide a characterization of quasi-finite complexes in terms of L-invertible maps and dimensional properties of compactifications. Several results related to the class of quasi-finite complexes are established, such as completion of metrizable spaces, existence of universal spaces and a version of the factorization theorem. Further, we extend the definition of UV(L)-spaces on non-compact case and show that some properties of UV(n)-spaces and UV(n)-maps remain valid, respectively, for UV(L)-spaces and UV(L)-maps.
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