<prompt> Ukudlula: Njengoba kuyathakazelisa njengoba i-Newtonian gravity ye-geometric ingaba, isisekelo sayo, i-classical mechanics, imane nje iyisimo esivimbelayo se- special mechanics. Ngolimi lwe-symmetry: lapho amandla adonsela phansi anganakwa, i-physics i-Lorentz invariant njengase-special relativity kunokuba i-Galilei invariant njengase-classical mechanics. I-symmetry echazayo ye-special relativity yiqembu le-Poincaré, elihlanganisa ukuhumusha, ukujikeleza kanye ne-boost. Umehluko phakathi kwalaba bobabili uba obalulekile lapho usebenza ngejubane elisondela ijubane lokukhanya, kanye nezenzakalo ezinamandla amakhulu. Nge-Lorentz symmetry, izakhiwo ezingeziwe ziza emdlalweni. Zichazwa yiqoqo lezinhlaka zokukhanya ama-conical. Isithombe-conical sichaza isakhiwo se-ca-conical: A, lapho kunomthelela kwesimiso, noma i-special relativ  <response>: Iqembu likaPoincaré 