<prompt> Ngokushesha ngemva kokushicilela inkolelo-mbono ekhethekile yokuhlobana ngo-1905, u-Einstein waqala ukucabanga ukuthi angayifaka kanjani amandla adonsela phansi ohlelweni lwakhe olusha lwe-relativistic. Ngo-1907, eqala ngokuhlolwa kwengqondo elula okubandakanya umbonisi ekuweni kwamahhala, waqala kulokho okungaba ukucinga kweminyaka eyisishiyagalombili ngenkolelo-mbono yokuhlobana yokudonsela phansi. Ngemuva kokuphenduka okuningi nokuqala okungamanga, umsebenzi wakhe wagcina ngokwethula ku-Prussian Academy of Science ngoNovemba 1915 kulokho manje okwaziwa ngokuthi ama-Einstein field equations. Lezi zichazo zicacisa ukuthi i-geometry yesikhala nesikhathi ithonywa kanjani yinoma yini into nemisebe ekhona, futhi yakha umnyombo wenkolelo-mbono ejwayelekile ka-Einstein yokuhlobana.  <response>: Ngo-1919 