`R`

is a builtin identifier in Sage and refers to the `r`

interface :

```
sage: R
sage.interfaces.r.R
sage: r
R Interpreter
```

Now I was wondering if the later R is related to the R letter used in a left hand side assignment for instance :

```
R.<x> = ZZ[]
```

1 | initial version |

`R`

is a builtin identifier in Sage and refers to the `r`

interface :

```
sage: R
sage.interfaces.r.R
sage: r
R Interpreter
```

Now I was wondering if the later R is related to the R letter used in a left hand side assignment for instance :

```
R.<x> = ZZ[]
```

2 | No.2 Revision |

`R`

is a builtin identifier in Sage and refers to the `r`

interface :

```
sage: R
sage.interfaces.r.R
sage: r
R Interpreter
```

Now I was wondering if the later R is related to the R letter used in a left hand side assignment for instance :

```
R.<x> = ZZ[]
```

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