How to deal with the subject function X^3/Y^2, where X and Y are variables.

Presuming `X >= 0, Y > 0`

, here is my CVX implementation of the formulation produced by @Michal_Adamaszek earlier in that thread.

Thank you for your help! I have noticed it, but i don’t know how to use it in subject function.

Do you understand it now, or do you know what you need to do?

In that link,

my `z`

is your `X`

my `y`

is your `Y`

my `x`

is a new variable which you can name what you want

my `s`

can be your `s`

.

Thanks! I know the relationship between the variables in that link and my variables, but i still don’t know how to write the cvx code here,i.e., ‘minimize (X^3/Y^2)’.

In my link, I said to use my x in place of z^3/y^2, so that would be minimize(x). Now just change the variable names to your code.

Thanks! I have dealt with this problem.But i have a new question that the first few times the program runs the results are ‘solved’ but suddenly the following results appear: Status: Infeasible

Optimal value (cvx_optval): +Inf. I want to know why this happened.

We have no idea what you ran, to include the relation between the various runs you made. Are you using SCA - if so, read my posts on this forum about it.

Yes, I used SCA, i want to know which posts may help me. Thanks!

http://ask.cvxr.com/search?q=sca%20order%3Alatest

Note: some of these have the word scalar or scaling in them, and do not pertain to SCA.