# maximal_marginal_relevance

> **Function** in `langchain_azure_cosmosdb`

📖 [View in docs](https://reference.langchain.com/python/langchain-azure-cosmosdb/_utils/maximal_marginal_relevance)

Calculate maximal marginal relevance.

## Signature

```python
maximal_marginal_relevance(
    query_embedding: np.ndarray,
    embedding_list: list,
    lambda_mult: float = 0.5,
    k: int = 4,
) -> List[int]
```

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[View source on GitHub](https://github.com/langchain-ai/langchain-azure/blob/e62c2a55aaa0942fdac739b4066011953b80018e/libs/azure-cosmosdb/src/langchain_azure_cosmosdb/_utils.py#L148)