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Sep 13, 2017 at 19:57 comment added Misha Did you look at the relevant section of Bridson and Haefliger? What you have in mind is a limiting case of their construction and, hence, will be CAT(-1). But its ideal boundary will be larger than $Z$.
Sep 13, 2017 at 13:17 history asked Loreno Heer CC BY-SA 3.0