# tensorflow::ops::SparseMatMul

`#include <math_ops.h>`

[Multiply](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/multiply#classtensorflow_1_1ops_1_1_multiply) matrix "a" by matrix "b".

## Summary

The inputs must be two-dimensional matrices and the inner dimension of "a" must match the outer dimension of "b". Both "a" and "b" must be `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/tensor#classtensorflow_1_1_tensor`s not `SparseTensor`s. This op is optimized for the case where at least one of "a" or "b" is sparse, in the sense that they have a large proportion of zero values. The breakeven for using this versus a dense matrix multiply on one platform was 30% zero values in the sparse matrix.

The gradient computation of this operation will only take advantage of sparsity in the input gradient when that gradient comes from a [Relu](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/relu#classtensorflow_1_1ops_1_1_relu).

Arguments:

- scope: A [Scope](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope) object

<br />

Returns:

- `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output`: The product tensor.

<br />

| ### Constructors and Destructors ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a44ec3b9c8a4a6c27ec1e5defa921a8c2(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input a, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input b)` ||
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a29e8ca18f70b1f18d2d5931606fa5108(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input a, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input b, const https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs#structtensorflow_1_1ops_1_1_sparse_mat_mul_1_1_attrs & attrs)` ||

| ### Public attributes ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1af4bedc3c3ba71553d0c1e30513898430` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/operation#classtensorflow_1_1_operation` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a9b708969f18250faa3e40edad285ae45` | `::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output` |

| ### Public functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1ae461c34d275e4d996e21af14b8870531() const ` | `::tensorflow::Node *` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a7e6d0d764e73510a120ea967abaf9250() const ` | ` `` ` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a3fee7729e51d2b640d654a25a84f0185() const ` | ` `` ` |

| ### Public static functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1acaa26e8e9d1e5854dcfef57dcb4efd5b(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs#structtensorflow_1_1ops_1_1_sparse_mat_mul_1_1_attrs` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1aaf87a4805b8269233969a514bea852ef(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs#structtensorflow_1_1ops_1_1_sparse_mat_mul_1_1_attrs` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1a41b864162f17688227aa34ee4d8021b2(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs#structtensorflow_1_1ops_1_1_sparse_mat_mul_1_1_attrs` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul_1af58949ad4394aa0ba7869e65ba742487(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs#structtensorflow_1_1ops_1_1_sparse_mat_mul_1_1_attrs` |

| ### Structs ||
|---|---|
| [tensorflow::ops::SparseMatMul::Attrs](https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/sparse-mat-mul/attrs) | Optional attribute setters for [SparseMatMul](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/sparse-mat-mul#classtensorflow_1_1ops_1_1_sparse_mat_mul). |

## Public attributes

### operation

```
Operation operation
```

### product

```
::tensorflow::Output product
```

## Public functions

### SparseMatMul

```
 SparseMatMul(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input a,
  ::tensorflow::Input b
)
```

### SparseMatMul

```
 SparseMatMul(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input a,
  ::tensorflow::Input b,
  const SparseMatMul::Attrs & attrs
)
```

### node

```
::tensorflow::Node * node() const 
```

### operator::tensorflow::Input

```
 operator::tensorflow::Input() const 
```

### operator::tensorflow::Output

```
 operator::tensorflow::Output() const 
```

## Public static functions

### AIsSparse

```
Attrs AIsSparse(
  bool x
)
```

### BIsSparse

```
Attrs BIsSparse(
  bool x
)
```

### TransposeA

```
Attrs TransposeA(
  bool x
)
```

### TransposeB

```
Attrs TransposeB(
  bool x
)
```