If such an \(f\) exists, \(X\) and \(Y\) are called homeomorphic, written \(X \cong Y\).
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Стало известно о наборе в ВСУ осужденных за тяжкие статьи08:51
Nature, Published online: 05 March 2026; doi:10.1038/d41586-026-00710-w