how to solve it for max Theta Curvature?

i'm looking for the pure math glyph formula..

it may be related to actually
3rd deriva & curvature function..

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    $\begingroup$ I realize you linked questions that explain it already. What exactly is missing? There is no problem on computing it but little use. $\endgroup$
    – AKdemy
    Mar 25, 2023 at 3:54
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    $\begingroup$ so whats the math formula? wikiless.org/wiki/… $\endgroup$
    – xelvet
    Mar 25, 2023 at 9:58
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    $\begingroup$ You can find this by ordinary calculus. Don't ask other to perform that task for you. $\endgroup$
    – Kurt G.
    Mar 25, 2023 at 14:06
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    $\begingroup$ Since theta is anyhow often computed as finite difference (reason), it's more natural to look at finite difference for the second order as well ("theta acc" in the linked question which shows all sorts of relationships and the full code to do it). $\endgroup$
    – AKdemy
    Mar 25, 2023 at 16:44