(l-onnx-doc-Not)=

# Not


(l-onnx-op-not-1)=

## Not - 1

### Version

- **name**: [Not (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#Not)
- **domain**: `main`
- **since_version**: `1`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 1**.

### Summary

Returns the negation of the input tensor element-wise.

### Inputs

- **X** (heterogeneous) - **T**:

  Input tensor

### Outputs

- **Y** (heterogeneous) - **T**:

  Output tensor

### Type Constraints

* **T** in ( `tensor(bool)` ):

  Constrain input/output to boolean tensors.