Latin quod erat demonstrandum txhais tau tias " dab tsi yuav tsum tau ua qauv qhia" Nws yog ib qho kev txhais lus ntawm cov lus Greek thaum ub cov lej lej muab tso rau qhov kawg ntawm cov pov thawj logical-ib yam. ntawm lub cim uas hais tias "Kuv ua pov thawj qhov kuv tau teev tseg. Kev siv rau cov ntawv luv Q. E. D. tau pom los ntawm lub xyoo pua 17th.
Dab tsi yog qhov txawv ntawm Q. E. D. and QEF?
"Q. E. F., " qee zaum sau "QEF," yog ib lo lus luv rau lo lus Latin "quod erat faciendum" ("qhov uas yuav tsum tau ua"). Nws yog kev txhais lus ntawm cov lus Greek siv los ntawm Euclid los qhia txog qhov kawg ntawm kev ncaj ncees ntawm kev tsim kho, thaum "Q. E. D." yog qhov kawg ntawm cov pov thawj ntawm lub theorem (cf.
Lub cim twg sawv cev rau quod erat demonstrandum?
Nyob rau hauv lej, lub qhov ntxa, halmos, kawg-ntawm-pov thawj, los yog Q. E. D. lub cim "∎" (los yog "□") yog lub cim siv los qhia qhov kawg ntawm cov pov thawj, nyob rau hauv qhov chaw ntawm cov ntawv luv luv "Q. E. D." rau lo lus Latin "quod erat demonstrandum ".
Q. E. D yog dab tsi hauv philosophy?
Philosophers. Xauv. Q. E. D. (quod erat demonstrandum) Latin rau "dab tsi yog qhov yuav tsum tau ua pov thawj." Li no, ib txoj hauv kev los txheeb xyuas qhov xaus ntawm kev ua lej lossis kev sib cav sib cav. (Nws tsis yog txhais tau tias "Zoo Yooj Yim Ua tiav.")
Does Q. E. D. txhais tau tias ua tau yooj yim heev?
"Hauv cov teb chaws uas hais lus Askiv cov ntawv tuaj yeem ua tau mean "Easily Done " los yog, qee zaus, "Quite Eloquently Done", los yog humourously "Quite Enough Done", "Quite Elegantly Ua tiav". Ib qho kev txhais lus ntau dua tuaj yeem yog "Saib, Kuv Qhia Koj Li ".
