# util
`sentence_transformers.util` defines different helpful functions to work with text embeddings.

## Helper Functions
```{eval-rst}
.. automodule:: sentence_transformers.util
   :members: paraphrase_mining, semantic_search, community_detection, http_get, truncate_embeddings, normalize_embeddings, is_training_available, mine_hard_negatives
```

## Model Optimization
```{eval-rst}
.. automodule:: sentence_transformers.backend
   :members: export_optimized_onnx_model, export_dynamic_quantized_onnx_model, export_static_quantized_openvino_model
```

## Similarity Metrics

```{eval-rst}
.. automodule:: sentence_transformers.util
   :members: cos_sim, pairwise_cos_sim, dot_score, pairwise_dot_score, manhattan_sim, pairwise_manhattan_sim, euclidean_sim, pairwise_euclidean_sim
```