Hi, I’m looking for ways to implement these functions in CVX:

```
y*log( 1 + 1/ x )
```

and

```
log( 1 + y /x )
```

and

```
y*log( 1 + y/x )
```

where `x`

and `y`

are both optimization variables.

All of these functions are from different optimization problems, so I’m already happy when there is a way to implement one of them.

I already had a look at How to handle convex $x_1\log(1+x_2/x_1)$ in DCP ruleset? but its slighly different I guess.

Thanks for your help!