Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: An karɓi tsarin sararin samaniya na Minkowski da sauri kuma ya ci gaba. Alal misali, Arnold Sommerfeld (1910) ya maye gurbin bayanin matrix na Minkowski ta hanyar zane-zane mai kyau kuma ya kirkiro kalmomin "vector hudu" da "vector shida". Ya kuma gabatar da tsarin trigonometric na ƙa'idar ƙara saurin saurin, wanda a cewar Sommerfeld, ya cire yawancin baƙon wannan ra'ayi. Sauran mahimman gudummawar da Laue ya bayar (1911, 1913), wanda ya yi amfani da tsarin sararin samaniya don ƙirƙirar ka'idar ka'idar jiki da ka'idar ƙwayoyin halitta. Ya faɗaɗa maganganun Minkowski don ayyukan lantarki zuwa duk ƙarfin da zai yiwu kuma ta haka ne ya fayyace manufar daidaitawar taro-makamashi. Laue ya kuma nuna cewa ana buƙatar ƙarfin da ba na lantarki ba don tabbatar da kaddarorin canjin Lorentz da suka dace, kuma don kwanciyar hankali na al'amarin <unk> ya iya nuna cewa "Poincaré damuwa" (kamar yadda aka ambata a sama) sakamako ne na dabi'a na ka'idar dangi don haka electron zai iya zama rufaffiyar tsarin.  Tambaya: Me kuma Minkowski ya gabatar?
Tsarin trigonometric na ƙa'idar ƙara saurin saurin