On Sat, Jun 21, 2025 at 12:24 AM Alan Grayson <[email protected]> wrote:
*> In what way, if any, did the equivalence of inertial and gravitational > mass play in the development of GR? TY, AG* *According to Einstein the Equivalence Principle was crucial in the evolution of his thoughts. Einstein said the idea occurred to him in 1908 and gave him the incentive to learn 4D non-Euclidean tensor calculus which at the time he didn't know very well; he said it was "the happiest thought of my life" although it took him another seven years, until 1915. before he found a way to use it to invent General Relativity. And the effort nearly killed him. * *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* ysa > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/CAJPayv0Xw2Zupm-4oJ%3D0%2BnOPs5%2Bx6YNuTruquT7Zz9yGc9e7cg%40mail.gmail.com.
