Why add cvx in front of zero?

What does this mean? Why add cvx in front of zero?

You tell us. It’s “your” code (which I presume you found somewhere).

That use of cvx is not documented in the CVX USers Guide.http://cvxr.com/cvx/doc/

My senior sister’s code.

I suggest you ask the code’s author. Then you can report your findings here. Thanks.

OK.Thank you very much!