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2 votes
1 answer
117 views

Size of the orbit of a dense set

This question is a follow-up to: this post. Let $X$ be a separable Banach space, $\phi\in C(X;X)$ be an injective continuous non-affine map, and $A$ be a dense $G_{\delta}$ subset of $X$. How big ...
MrsHaar's user avatar
  • 63
3 votes
1 answer
232 views

Is there a canonical uniform probability measure on compact subsets of Banach spaces?

One can construct a finite measure on a compact metric space $(X,d)$ by the following procedure: Fix a non-negative sequence $\{\epsilon_n\}$, $\epsilon_n \to 0$. Let $Y_{\epsilon_n}$ be the minimal ...
shasha's user avatar
  • 31
1 vote
1 answer
353 views

Agreement of two topologies on a linear space

I'm dealing with the formalism of an abstract Wiener space, and I'm not sure if two relevant topologies coincide. Let $X$ be a topological vector space, and let $X^*$ be its dual space of continuous ...
Tom LaGatta's user avatar
  • 8,512