Keywords: Lagrange multiplier.png ca Fig 1 En verd el lloc geomètric corba de nivell o isolÃnia dels punts que satisfan la restricció g x y c En blau els contorns de f Les fletxes representen el gradient que té una direcció perpendicular a la tangent de la isolÃnia zh 图1ï¼šç»¿çº¿æ ‡å‡ºçš„æ˜¯çº¦æ Ÿg x y cçš„ç‚¹çš„è½¨è¿¹ã ‚è“ çº¿æ˜¯fçš„ç‰é«˜çº¿ã ‚ç®å¤´è¡¨ç¤ºæ– 率,和ç‰é«˜çº¿çš„法线平行㠂 Transferred from http //en wikipedia org en wikipedia; Transfer was stated to be made by User CavallBernat 2005-12-24 Original uploader was M0nkey at http //en wikipedia org en wikipedia Later version s were uploaded by Andrew pmk at http //en wikipedia org en wikipedia Released into the public domain by the author en wikipedia M0nkey LagrangeMultipliers2D svg original upload log page en wikipedia Lagrange_multiplier png 2007-06-06 02 05 Andrew pmk 445×389×8 26024 bytes <nowiki>optimize png</nowiki> 2005-12-24 22 25 M0nkey 445×389×8 29801 bytes <nowiki></nowiki> 2005-12-24 22 18 M0nkey 520×397×8 31360 bytes <nowiki></nowiki> Multivariate calculus Optimization |