Gerenuk
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 Sep 5 awarded Yearling Aug 27 comment Check algebraic transformation with trial numbers? The question is still whether a single test is enough. Can you give an example equation which includes $\exp\sqrt{2}$ and $\exp\sqrt{3}$, has only basic arithmetics and has conflicting truth values after transformations? Aug 23 revised Check algebraic transformation with trial numbers? added 84 characters in body Aug 22 revised Check algebraic transformation with trial numbers? added 54 characters in body Aug 22 comment Check algebraic transformation with trial numbers? But my function class seems pretty trivial. It's mostly rational functions. And I only do basic high school rearrangements. Do this help to prove anything? Aug 22 asked Check algebraic transformation with trial numbers? Jul 11 comment Functional equation on integers It works. Thank you. I've made a screenshot above. Jul 11 revised Functional equation on integers added 158 characters in body Jul 11 accepted Functional equation on integers Jul 10 revised Functional equation on integers deleted 120 characters in body Jul 10 comment Functional equation on integers How did you find that matrix? I could imagine an approach like yours can work for my (new) additional condition, too? I'll check tomorrow :) Jul 10 revised Functional equation on integers added 903 characters in body Jul 10 comment Functional equation on integers Oh damn. You are right. I cannot get my nice pattern easily. Jul 10 revised Functional equation on integers added 259 characters in body Jul 10 comment Functional equation on integers True, that's good understanding. If you don't mind I'd like to add a condition, which I was unconsciously assuming but I forgot to state. Jul 10 comment Functional equation on integers Not sure if I get it right. To undo you need $(x+y)/2$? Jul 10 revised Functional equation on integers added 172 characters in body Jul 10 asked Functional equation on integers May 26 accepted Does any numerical diff.eq. solver give correct results given small step-size? May 26 comment Does any numerical diff.eq. solver give correct results given small step-size? What is definition of "convergence" here? (I'm new to this) I imagine naively running an Euler step from a starting point $x_0$ and seeing the the correct function will be reproduced on an fixed interval $[x_0, x_1]$ . Is this the same? Shouldn't any finite step solution be correct at least a few steps, given small $h$?