Q is not consonant: the Costantini-Watson argument

I have already given an argument for the non-consonance of the Sorgenfrey line R here. I would now like to explain why the space Q of rational numbers is not consonant either. That is quite a challenge. The most easily accessible proof is due to Costantini and Watson, but it still requires some effort to understand. Fortunately, the topological game of last time will help us make sense of at least one half of the construction. Read the full post.

This entry was posted in Uncategorized. Bookmark the permalink.