why fminon missed extreme points during iteration？The convergence value is not optimal

the result missed extremely fval，onvergence value is not optimal consequently.

Here are the options parameters

[Torsten]

Which value do you have in mind ?

4.715255 is greater than 4.714934, not smaller.

[汉森 戴]

thank you，sir. i recognize my problem until i sleep.

[汉森 戴]

may i ask you another question about fmincon，sir？

[Torsten]

Let's try.