The determinate of H of -x1x2 are 0 and negative and the eig values are positive and negative. So the function not convex and not concave. How did you claim that the function is convex? Thanks
Such a comprehensive video! Thanks a lot Sir! Really appreciate your efforts. Also, sir are there any videos on quasi convexity and concavity on channel?. If yes, kindly do share the link. Thanks in advance!
Compute third, fourth , fifth .... Derivatives until you get first non zero value at stationary point. If odd power derviative is non zero then point is saddle otherwise if even order derivation is > then min else maximum. For example f(x)=x^4 then stationary point is x=0. Here f^''(x)=0 and hence compute f^'''(x) =24x =0. So compute next derivative f^''''(x)= 24 non zero. As fourth derivative (which is even) is non zero and it is >0 thus stationary point (x=0) is minimum. Hope it clear
Thanks a lot for such detailed video with good amount of exercise too! You are really helping students a lot! Love and respect from France
in 11:27 how x1x2 is a convex fn
best video sir
Sir your explanation on concave and convex function are fabulous. But I want to know also how to find quasiconcavity and quasi convaxity function.
Excellent job sir best vedio Lecture on concavity and convexity 👍👍👍👍👍👍👍👍
Many thanks for appreciation
The determinate of H of -x1x2 are 0 and negative and the eig values are positive and negative. So the function not convex and not concave. How did you claim that the function is convex? Thanks
Such a comprehensive video! Thanks a lot Sir! Really appreciate your efforts. Also, sir are there any videos on quasi convexity and concavity on channel?. If yes, kindly do share the link. Thanks in advance!
Thanks... Its my pleasure.
How we will show that the function f(x,\theta)=1-x/\theta, 0
principle minor 4 kidgr sy nikla ha ap ny?
Best explanation
Thanks for liking
Best explanation❤❤
Glad you like it ... Hope others too
Sir clc means??
Convex linear combination
Sir logx covex hai?
Its a concave .... As f'' =-1/x^2
@@DrHarishGarg thank you so much sir i got it now. Actually i got confused between convex upward every where and concove which is i think same......
What will happen if 2nd derivative is zero
Compute third, fourth , fifth .... Derivatives until you get first non zero value at stationary point. If odd power derviative is non zero then point is saddle otherwise if even order derivation is > then min else maximum.
For example f(x)=x^4 then stationary point is x=0. Here f^''(x)=0 and hence compute f^'''(x) =24x =0. So compute next derivative f^''''(x)= 24 non zero. As fourth derivative (which is even) is non zero and it is >0 thus stationary point (x=0) is minimum.
Hope it clear
👍
Tq so much sir