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Dec 21, 2023 at 1:29 answer added Anton Petrunin timeline score: 2
Dec 9, 2017 at 17:51 answer added Suvrit timeline score: 2
S Dec 9, 2017 at 15:51 history suggested jeq CC BY-SA 3.0
Copied image to imgur.com, as it was not being displayed because of the new https rule. Added link to original image source.
Dec 9, 2017 at 14:44 review Suggested edits
S Dec 9, 2017 at 15:51
Apr 20, 2014 at 14:12 vote accept Joseph O'Rourke
Jul 14, 2012 at 13:55 comment added Misha See also Ballmann's "Lectures on spaces of nonpositive curvature", math.psu.edu/petrunin/papers/akp-papers/ballmann-lect.pdf The advantage over Bridson and Haefliger is that Ballmann's book is shorter and has all the staff that you need.
Jul 14, 2012 at 9:22 answer added Igor Rivin timeline score: 2
Jul 14, 2012 at 5:09 comment added Russ Woodroofe I, too, would like to better understand CAT(0) metric spaces. In addition to the Bridson-Haefliger book, I have had recommended to me "A course in metric geometry", by Burago, Burago, and Ivanov.
Jul 14, 2012 at 1:55 answer added Patricia Hersh timeline score: 9
Jul 14, 2012 at 1:48 comment added Joseph O'Rourke Thanks, Ian, that book (Metric Spaces of NonPositive Curvature, 2009) seems perfect, even freely downloadable as PDF (in comparison to 122 $US to purchase new!)---Thanks!
Jul 14, 2012 at 1:26 comment added Ian Agol Have you had a look at Bridson-Haefliger? math.psu.edu/petrunin/papers/scans/books/bridson.haefliger.pdf
Jul 14, 2012 at 1:19 history asked Joseph O'Rourke CC BY-SA 3.0