Some sort equation ... - Printable Version +- Tetration Forum ( https://math.eretrandre.org/tetrationforum)+-- Forum: Tetration and Related Topics ( https://math.eretrandre.org/tetrationforum/forumdisplay.php?fid=1)+--- Forum: Mathematical and General Discussion ( https://math.eretrandre.org/tetrationforum/forumdisplay.php?fid=3)+--- Thread: Some sort equation ... ( /showthread.php?tid=1029) |

Some sort equation ... - tommy1729 - 10/15/2015
I was thinking about the sign of the n th Derivative. More precisely real analytic for x>0 where the expansion point Goes from 0 to + oo. Sine and cosine are simple. But for other cases , when the expansion point Goes to + oo it is less trivial. For instance - too give a quite general case - What about e.g. D^a(n) f(b(m)) < 0 D^a2(n) f(b2(m)) > 0. What are the solutions and how to find them easily ? Maybe this is easy sorry. I havent thought about it much. Regards Tommy1729 |