Brian You can read .nb files for free - look at this link http://www.wolfram.com/products/mathreader/
Coincidentally, I've just sent a message to Eric Weisstein about a typo on his Lehmer's Formula page. Cheers, Mike On 21/02/2015 15:34, Brian Schott wrote:
A question at quora.com somehow got my attention. I am NOT including the link because I think you have to register to read articles. If you want to register or are already registered, the title of the article is, "What is the most difficult concept to grasp in physics?" answered by Alejandro Jenkins. Two features of that answer are especially interesting to me, the latter being the main reason for my sharing here. At the following link there is a brief video demonstrating the "tennis racket theorem" that made the phenomenon more meaningful to me. https://www.youtube.com/watch?v=4dqCQqI-Gis The really fascinating link is below though, if you have not seen it already. The contents of this link may be especially informative to those who are fluent in the math of tensors, but to me its the more quotidian, day-to-day comments that cemented me to my computer chair, reading. This link was given in a comment to the original quora answer and gives a transcript of the talk given by astronaut Michael Foale of his Mir experience. If you poke around by shortening the link you will see there is also a downloadable Mathematica notebook for the presentation. I do not have Mathematica and could not decipher the .nb file, but if anyone knows how to translate key aspects of the .nb into J, I would be fascinated, surely. http://www.mathematica-journal.com/issue/v7i3/special/transcript/html/
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