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You are not logged in. #1 20100731 13:07:56
catenaryA catenary is the curve: If you roll a parabola along the xaxis, the focus of the rolling parabola traces out a catenary. I read this a number of places, but I've yet been able to find, or create, a proof. Can anyone help? Please? Last edited by bossk171 (20100731 13:08:18) There are 10 types of people in the world, those who understand binary, those who don't, and those who can use induction. #2 20100731 14:16:34
Re: catenaryHi bossk171; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #3 20100731 15:39:45
Re: catenaryHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #4 20110727 15:39:17
Re: catenaryIs the shape of the streamlines formed by a swimming duck a catenary? Is the shape of a supposedly shatterproof (I have broken them) ruler being bent, each end pressed onto my fingertips, a catenary? I know that the shape of a chain held at both ends is a catenary. #5 20110727 19:36:52
Re: catenaryhi bosk171 The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment 