# xarray.CFTimeIndex.intersection

#### CFTimeIndex.intersection(other, sort=False)[[source]](https://github.com/pydata/xarray/blob/main/xarray/../.pixi/envs/doc/lib/python3.14/site-packages/pandas/core/indexes/base.py#L3242-L3336)

Form the intersection of two Index objects.

This returns a new Index with elements common to the index and other.

* **Parameters:**
  * **other** ([`Index`](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.html#pandas.Index) or [array-like](https://numpy.org/doc/stable/glossary.html#term-array_like)) – An Index or an array-like object containing elements to form the
    intersection with the original Index.
  * **sort** ([`True`](https://docs.python.org/3/builtins/constants.html#True), [`False`](https://docs.python.org/3/builtins/constants.html#False) or [`None`](https://docs.python.org/3/builtins/constants.html#None), *default* [`False`](https://docs.python.org/3/builtins/constants.html#False)) – Whether to sort the resulting index.
    * None : sort the result, except when self and other are equal
      or when the values cannot be compared.
    * False : do not sort the result.
    * True : Sort the result (which may raise TypeError).
* **Returns:**
  [`Index`](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.html#pandas.Index) – Returns a new Index object with elements common to both the original Index
  and the other Index.

#### SEE ALSO
`Index.union`
: Form the union of two Index objects.

`Index.difference`
: Return a new Index with elements of index not in other.

`Index.isin`
: Return a boolean array where the index values are in values.

### Examples

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```pycon
>>> idx1 = pd.Index([1, 2, 3, 4])
>>> idx2 = pd.Index([3, 4, 5, 6])
>>> idx1.intersection(idx2)
Index([3, 4], dtype='int64')
```

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