Tawm suab txhais lub xeev
Kev tsa suab hais txog lub xeev qhov txav ceev ntawm ib yam twj paj nruag ntsig txog qee yam siv thaum cov khoom nyob hauv kev tawm suab Cov ntsiab lus ntawm cov lus tsa suab muaj xws li: qhov loj me ntawm cov lus tsa suab nrawm ntawm qhov khoom (tus nqi ntawm qhov hloov ntawm lub nruas' s txoj haujlwm vector rau ib ntu sijhawm (dr / dt), uas yog, hloov chaw ntawm cov khoom ib chav tsev lub sijhawm) thiab cov kev taw qhia ntawm cov kwv' s suab nrawm. Tseem raug los yog txav kuj ntog hauv nws cov kev nthuav dav.