MathDB

1

Part of 2006 Miklós Schweitzer

Problems(1)

topology

Source: miklos schweitzer 2006 q1

8/31/2021
Prove that if X is a compact T2T_2 space, and X has density d(X), then X3X^3 contains a discrete subspace of cardinality d(X)d(X). note: d(X)d(X) is the smallest cardinality of a dense subspace of X.
topologyDensitycardinal function