tag:blogger.com,1999:blog-3525174544175275879.post1892683324119859785..comments2012-01-11T12:25:38.385+02:00Comments on Yet another defunct blog: Revisiting real analysisRoman Cheplyakahttp://www.blogger.com/profile/07189392968519496723noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3525174544175275879.post-30195374731321193902008-06-11T19:01:00.000+03:002008-06-11T19:01:00.000+03:00It isn't very obvious, that's why it took so long ...It isn't very obvious, that's why it took so long for me to get it :)<BR/>But in general, if you search for a function with discontinuous derivative, it's natural to search for the derivative itself (I think that's how everyone would try to solve this problem). And if you're trying to search in a space of <EM>derivatives</EM>, it's natural to take into account the rules which derivatives must obey. Darboux theorem is one of such rules.Roman Cheplyakahttp://www.blogger.com/profile/07189392968519496723noreply@blogger.comtag:blogger.com,1999:blog-3525174544175275879.post-71831604248364684362008-06-11T16:49:00.000+03:002008-06-11T16:49:00.000+03:00Well, that’s pretty :) But why is it obvious to co...Well, that’s pretty :) But why is it obvious to consider Darboux theorem while inventing a counterexample?Dan Mysakhttp://www.blogger.com/profile/08301816863891217438noreply@blogger.com