<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: Isendlalelo: Nakuba amandla adonsela phansi aseNewton engase abe ayingqayizivele, isisekelo sawo, i - classical mechanics, simane nje siyisimo esivimbelayo se - special relativistic mechanics. Ngolimi lwe-symmetry: lapho amandla adonsela phansi engenakunakwa khona, i-physics i-Lorentz invariant njengase-special relativity kunokuthi i-Galilei invariant njengase-classical mechanics. I-symmetry echazayo ye-special relativity yiqembu le-Poincaré, elihlanganisa ukuguqulwa, ukujikeleza nokukhuthaza. Umehluko phakathi kwalokhu okubili uba obalulekile lapho kubhekwana namajubane asondela ijubane lokukhanya, kanye nezimo zamandla aphezulu. Ngokulingana kukaLorentz, izakhiwo ezengeziwe ziyadlala. Zichazwe yiqoqo lamakhoni okukhanya bheka isithombe. Izigaxa zokukhanya zichaza isakhiwo esiyimbangela: ngesigameko ngasinye A, kunesethi yezenzakalo ezingathonya noma zithonywe ngu-A ngokusebenzisa amasignali noma ukuxhumana okungadingi ukuhamba ngokushesha kunokukhanya njengesigameko B esithombeni, kanye nesethi yezenzakalo lapho ithonya elinjalo lingenakwenzeka khona njengesigameko C esithombeni. Le mibuthano ayixhomekile kumuntu oyibonayo. Ngokuhambisana nemigqa yomhlaba yezinhlayiya eziwa ngokukhululeka, amakhoni okukhanya angasetshenziselwa ukwakha kabusha imethrikhi ye-space-times semi-Riemannian, okungenani kuze kufike ku-scalar factor. Ngamagama ezibalo, lokhu kuchaza isakhiwo esihambisanayo noma i-conformal geometry. Umbuzo: Ku-Symmetry, siyini isilinganiso esikhethekile sokunyakaza?  <response>: Iqembu likaPoincaré 