A note on condensations of $C_p(X)$ onto compacta
Commentationes Mathematicae Universitatis Carolinae, Tome 43 (2002) no. 3, pp. 485-492
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A condensation is a one-to-one continuous mapping onto. It is shown that the space $C_p(X)$ of real-valued continuous functions on $X$ in the topology of pointwise convergence very often cannot be condensed onto a compact Hausdorff space. In particular, this is so for any non-metrizable Eberlein compactum $X$ (Theorem 19). However, there exists a non-metrizable compactum $X$ such that $C_p(X)$ condenses onto a metrizable compactum (Theorem 10). Several curious open problems are formulated.
A condensation is a one-to-one continuous mapping onto. It is shown that the space $C_p(X)$ of real-valued continuous functions on $X$ in the topology of pointwise convergence very often cannot be condensed onto a compact Hausdorff space. In particular, this is so for any non-metrizable Eberlein compactum $X$ (Theorem 19). However, there exists a non-metrizable compactum $X$ such that $C_p(X)$ condenses onto a metrizable compactum (Theorem 10). Several curious open problems are formulated.
Classification :
54A25, 54A35, 54C35, 54D30
Keywords: condensation; compactum; network; Lindelöf space; topology of pointwise convergence; $\sigma $-compact space; Eberlein compactum; Corson compactum; Borel set; monolithic space; tightness
Keywords: condensation; compactum; network; Lindelöf space; topology of pointwise convergence; $\sigma $-compact space; Eberlein compactum; Corson compactum; Borel set; monolithic space; tightness
@article{CMUC_2002_43_3_a7,
author = {Arhangel'skii, A. V. and Pavlov, O. I.},
title = {A note on condensations of $C_p(X)$ onto compacta},
journal = {Commentationes Mathematicae Universitatis Carolinae},
pages = {485--492},
year = {2002},
volume = {43},
number = {3},
mrnumber = {1920523},
zbl = {1090.54003},
language = {en},
url = {http://geodesic.mathdoc.fr/item/CMUC_2002_43_3_a7/}
}
TY - JOUR AU - Arhangel'skii, A. V. AU - Pavlov, O. I. TI - A note on condensations of $C_p(X)$ onto compacta JO - Commentationes Mathematicae Universitatis Carolinae PY - 2002 SP - 485 EP - 492 VL - 43 IS - 3 UR - http://geodesic.mathdoc.fr/item/CMUC_2002_43_3_a7/ LA - en ID - CMUC_2002_43_3_a7 ER -
Arhangel'skii, A. V.; Pavlov, O. I. A note on condensations of $C_p(X)$ onto compacta. Commentationes Mathematicae Universitatis Carolinae, Tome 43 (2002) no. 3, pp. 485-492. http://geodesic.mathdoc.fr/item/CMUC_2002_43_3_a7/