Constrained local su¢ cient conditions

Obviously

(^)
F^0 (x 0 )(xx 0 )+o(kxx 0 k)
(^2)

(^)
F^0 (x 0 )(xx 0 )
(^2)

• +ko(kxx 0 k)k^2 +


• 
  

  2
  F^0 (x 0 )(xx 0 ),o(kxx 0 k)

  
  

  =
  (^)
  F^0 (x 0 )(xx 0 )
  (^2)
  +o

  
  



kxx 0 k^2



.