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When you closed your notebook without saving did you have another notebook open? Or a Help page? Closing a notebook is not the same as closing a Mathematica Session. If you want to start over then close everything and start a new Session. I just...
Judging by the overwhelming number of responses, I'd say no. Workbench is in serious need of an upgrade.
You can't use the Attributes function for that purpose. But you can write statements similar to what you have setting the conditions for x to True, Then you can use them as Assumptions in Simplify and similar statements, or in Assuming or in...
I have posted [a new thread](https://community.wolfram.com/groups/-/m/t/2141884) summarizing issues with `Quantity` that have been raised here. Further responses should go to that thread. This one has a considerable noise-to-signal fraction and we...
@david Documentation notebooks use a built-in stylesheet and they have disabled editing it using the standard mechanism, grrr... but you can likely go edit the file directly, likely located at ...
David, I have a well developed tensor program, Tensorial, that I could share with you. It has all the standard processing of tensor index notation. And I have another solution, which is even better if you are interested in the mathematics of...
Also, since each of the x1, x2, x3 terms are functions dependent on variables, I might not have reached a solution.
Besides the fact that rigid replacement can be problematic, I would like to remark one more pitfall (or misunderstanding) one might face when using `Subscript` (because you started your code nicely with `Clear["Global*'"]`- in general a good idea!)....
Hi Philip Wolfram|Alpha Notebook Edition, or WANE, was designed to offer the simplicity of W|A but without the one-off/disposable nature of it. The dedicated development team did an incredible amount of work on this product so that the suggestion...
"Writers shouldn't have to become system programmers and experts in type setting to make their notebooks look good." I don't agree with your expectation that manufacturers should support an operating system that has been superseded twice in the...