Sat March 6th second Tetration mtg; Peter Walker's 1991 paper sheldonison Long Time Fellow Posts: 684 Threads: 24 Joined: Oct 2008 03/04/2021, 05:23 PM (This post was last modified: 03/04/2021, 05:30 PM by sheldonison.) (03/02/2021, 04:56 PM)MphLee Wrote: I suggest you to create a new cross-referenced post with the new date in the title. Thanks MphLee, I updated my first post in this thread with the new March 6th invite!  See you all there!  Next Saturday Mar 6th, 1pm eastern, 1800 GMT, invitation to our second monthly Tetration zoom meeting. We will discuss Peter Walker's 1991 paper, http://eretrandre.org/rb/files/Walker1991_111.pdf https://us02web.zoom.us/j/89038247428?pwd=UFo1dmVGT21YTHpSbTNqUjMyazUzQT09 Meeting ID: 890 3824 7428 Passcode: 322183 - Sheldon tommy1729 Ultimate Fellow Posts: 1,906 Threads: 409 Joined: Feb 2009 03/07/2021, 12:35 AM was it recorded now ?  Regards tommy1729 Gottfried Ultimate Fellow Posts: 900 Threads: 130 Joined: Aug 2007 03/07/2021, 10:42 AM (This post was last modified: 03/07/2021, 11:08 AM by Gottfried.) I'll add two links from my work which might be specifically helpful. One essay on Andy's slog, matrix and matrix-inverse taken by LR-decomposition makes better informed decision possible, how the coefficients of the solution-power series converge when matrixsize is increased    https://math.eretrandre.org/tetrationfor...hp?tid=251 One essay on the slog as comparision with the concept of indefinite summation, where I find an example, where the indefinite summation works to give a valid powerseries, and is shown that the matrix-method is closely related (if not identical!) to the Andy's /Walkers matrixmethod https://math.eretrandre.org/tetrationfor...hp?tid=709 Two more links: https://math.eretrandre.org/tetrationfor...74#pid4874 problem of reproducing the identy by (Bb-I)*SLOG =?= I0 this might indicate a principal problem of accuracy of matrix-method, even when dimension is increased/powerseries solution is prolonged https://math.eretrandre.org/tetrationfor...hp?tid=179 "Exact entries" for the matrix-method by Andrew 13.3.2009. I discussed his found formula, but could not fix the relation with the "regular" method via Schröder function. Moreover, maybe the introduction of the integrals is in fact a *modification* of the Walker/Robbins-method, and not only an explication. At the moment I feel unable to come over with a quick-shot to put this together; maybe I'll find time and concentration next days. For an introduction into that matrix-thinking I could offer a live-session using zoom where I show my matrix-analyses in action, so anyone who is interested should be able to analyze the above linked articles/essays/postings. Gottfried Gottfried Helms, Kassel JmsNxn Ultimate Fellow Posts: 1,214 Threads: 126 Joined: Dec 2010 03/07/2021, 08:30 PM Hey, Gottfried I wrote a brief response on your discussion about the indefinite sum. Getting indefinite sums of exponentially bounded functions is surprisingly elementary now, due to Ramanujan (I added some tweaks to his method largely using fractional calculus in my second year of undergrad). So getting $\sum_{j=1}^s \log^a(j)$ is not very hard, and there exists many formulas for it. « Next Oldest | Next Newest »

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