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| Can Nice Spaces be Broken into Two Equal Parts? Attilio Le Donne Asked in Can Nice Spaces be Broken into Two Equal Parts? by Stephen Watson | |||||||||||
Clearly the two questions can be answered if we can find spaces X, with these properties, so that there is a point p in X so that each closed set not containing p has cardinality different from that of X.
For the first question take the metric hedgehog with for each n, \alphan spines of length 1/n, where \alphan is an increasing sequence of cardinals bigger than 2\omega.
For the second question, under the assumption \omega\omega <= 2\omega, a dense in itself subset of [0,1] so that the cardinality of X \cap [1/(n+1), 1/n] is \omegan and 0 in X gives a consistent answer.