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0 So I have an older version of skype that works very well with a click to call chrome extension (automatically calls when hyperlink tel is clicked). I tried to use the newest version skype from the W10 app store but it doesn't automatically call which is not what I need. I've been looking everywhere on how to set the tel: protocol to open up for the older version skype that I have, but it only forces me to choose an app from the W10 store. This is really irritating me, and I'm really hating W10 right now. I assume you can change something in the registry? If somebody could help me out, that would be wonderful! ] tldr; W10 won't let me set an older version of skype as the default program to open. windows-10 skype ...

0 $begingroup$ So I really want to do well in my differential geometry course next semester, the professor is the one that I want to do research with eventually. Furthermore, santa is bringing me Do Carmo's "differential geometry of curves and surfaces" for xmas, but since I know Jesus is real and Santa isn't i'm sure my mother will give it to me as soon as I get back home for the holidays. Will this text be adequate for a standard graduate level introduction to the topic? I hear that if you are really serious about differential geometry spivak is the only way to go, am I correct in my thinking that that may be overkill for my purposes? I mean Spivak is broken up into five volumes, so yeah, seems like a bit much. Thanks! book-recommendation ...