1 | initial version |

You can get the list of strings representing your variables as follows:

```
sage: [str(i) for i in Vlist]
['x', 'y']
```

So you can define your polynomial ring directly, without the `<>`

construction:

```
sage: P = PolynomialRing(QQ, [str(i) for i in Vlist], order='degrevlex')
sage: P
Multivariate Polynomial Ring in x, y over Rational Field
```

But now, the Python variables `x`

and `y`

still point to the symbols `x`

and `y`

(that belong to the Symbolic Ring), not the indeterminates `x`

and `y`

that belong to `P`

. For this you can do:

```
sage: P.inject_variables()
Defining x, y
```

Then:

```
sage: f=x^2+y^3
sage: f.lm()
y^3
```

2 | No.2 Revision |

You can get the list of strings representing your variables as follows:

```
sage: [str(i) for i in Vlist]
['x', 'y']
```

So you can define your polynomial ring directly, without the `<>`

construction:

```
sage: P = PolynomialRing(QQ, [str(i) for i in Vlist], order='degrevlex')
sage: P
Multivariate Polynomial Ring in x, y over Rational Field
```

But now, the Python variables `x`

and `y`

still point to the symbols `x`

and `y`

(that belong to the Symbolic Ring), not the indeterminates `x`

and `y`

that belong to `P`

. For this you can do:

```
sage: P.inject_variables()
Defining x, y
```

Then:

```
sage: f=x^2+y^3
sage: f.lm()
y^3
```

By the way, note that if your variables are going to be `x0`

, `x1`

,...,`x9`

(say), you can use the following construction:

```
sage: P = PolynomialRing(QQ, 10, 'x', order='degrevlex')
sage: P
Multivariate Polynomial Ring in x0, x1, x2, x3, x4, x5, x6, x7, x8, x9 over Rational Field
sage: P.inject_variables()
Defining x0, x1, x2, x3, x4, x5, x6, x7, x8, x9
```

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