Latin quod erat demonstrandum txhais tau tias "dab tsi yog qhov yuav tsum tau ua." Nws yog ib qho kev txhais lus ntawm cov lus Greek thaum ub cov neeg ua lej muab tso rau tom kawg ntawm cov ntaub ntawv pov thawj-ib hom thwj 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.
QED yog dab tsi?
QED yog cov lus luv ntawm lo lus Latin "Quod Erat Demonstrandum" uas txhais tau tias xoob txhais tau tias " uas yuav tsum tau ua qauv qhia ". Nws feem ntau muab tso rau hauv qhov kawg ntawm cov ntawv pov thawj lej los qhia tias cov ntawv pov thawj tiav.
Koj puas muab QED thaum kawg ntawm qhov pov thawj?
Nyob rau hauv lej, tombstone, halmos, kawg-ntawm-pov thawj, los yog Q. E. D. cim " ∎" (los yog "□") yog ib lub cim siv los qhia txog 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". … Hauv Unicode, nws tau sawv cev ua tus cim U+220E ∎ END OF PROOF (HTML ∎).
QED txhais li cas hauv lej?
QED yog ib lo lus luv luv ntawm lo lus Latin " quod erat demonstrandum, "uas yog siv los qhia qhov ua tiav ntawm kev ua lej pov thawj.
Thaum tus lej lej sau QED thaum kawg ntawm daim ntawv pov thawj Qhov no txhais li cas?
"Q. E. D." (qee zaum sau "QED") yog ib lo lus luv luv rau lo lus Latin " quod erat demonstrandum" ("uas yuav tsum tau ua qauv qhia"), ib qho kev sau uas feem ntau muab tso rau tom kawg ntawm ib tug lej pov thawj los qhia nws ua tiav.
