$\setdef{1}$ and $\setdef{\setdef{1}, 2}$
Terms
| Term | This example | Why |
|---|---|---|
| element of | ✓ | $\setdef{1}$ is an element of $\setdef{\setdef{1}, 2}$ because it is listed in the set. |
| subset | ✗ | $\setdef{1}$ and $\setdef{\setdef{1}, 2}$ is not a subset, because its element $1$ is not an element of $\setdef{\setdef{1}, 2}$. |
| proper subset | ✗ |