i\in\{1,\dots,N\}

g\in\{1,\dots,N\}

x_{i,g} binary decision variable

y_{i,j,g} binary decision variable

I want to maximize \sum_{i<j}\sum_g w_{i,j} y_{i,j,g}

subject to

\begin{align}
y_{i,j,g} &\le x_{i,g} &&\text{for all $i<j$ and all $g$} \\
y_{i,j,g} &\le x_{j,g} &&\text{for all $i<j$ and all $g$} \\
\end{align}

I declare the variable as

```
variable X(N,G) binary
variable Y(N,N,G) binary
```

How can I express the objective and the last two constraints?