.. _l-onnx-doc-Acosh:

=====
Acosh
=====

.. contents::
    :local:


.. _l-onnx-op-acosh-9:

Acosh - 9
=========

**Version**

* **name**: `Acosh (GitHub) <https://github.com/onnx/onnx/blob/main/docs/Operators.md#Acosh>`_
* **domain**: **main**
* **since_version**: **9**
* **function**: False
* **support_level**: SupportType.COMMON
* **shape inference**: True

This version of the operator has been available
**since version 9**.

**Summary**

Calculates the hyperbolic arccosine of the given input tensor element-wise.

**Inputs**

* **input** (heterogeneous) - **T**:
  Input tensor

**Outputs**

* **output** (heterogeneous) - **T**:
  The hyperbolic arccosine values of the input tensor computed
  element-wise

**Type Constraints**

* **T** in (
  tensor(double),
  tensor(float),
  tensor(float16)
  ):
  Constrain input and output types to float tensors.

**Examples**

**default**

::

    node = onnx.helper.make_node(
        "Acosh",
        inputs=["x"],
        outputs=["y"],
    )

    x = np.array([10, np.e, 1]).astype(np.float32)
    y = np.arccosh(x)  # expected output [2.99322295,  1.65745449,  0.]
    expect(node, inputs=[x], outputs=[y], name="test_acosh_example")

    x = np.random.uniform(1.0, 10.0, (3, 4, 5)).astype(np.float32)
    y = np.arccosh(x)
    expect(node, inputs=[x], outputs=[y], name="test_acosh")