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1 vote
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Uncountable product of second countable spaces

Let $(X_i, \mathcal{T}_i)_{i \in I}$ be a family non indiscrete topological spaces and equip the product with the product topology $\mathcal{T}$. If $\prod X_i$ is second countable, prove that $|I|...
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16 votes
1 answer
282 views

Constraining a dense sequence on a product space, one factor at a time

Slogan: Given a sequence on $X\times Y$, can we choose subsequences to fix the limit in $X$ while leaving the behavior on $Y$ free? Details: Suppose $X$ and $Y$ are topological spaces and $(x_n,y_n)...
Chris Culter's user avatar
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11 votes
2 answers
2k views

Compact topological space not having Countable Basis?

Does there exist a compact topological space not having countable basis? I have constructed a product space from uncountably many unit intervals $[0,1]$, endowed with the product topology. Tychonoff'...
Dilemian's user avatar
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