Add docs (#625)

* Update stargan.md

* fix the paddle_type

* add docs

* add docs

* add acknowledge

* fix the docs

* fix the docs

* add docs

* fix

* add docs

* add docs

* Update README.md

docs/pytorch_project_convertor/API_docs/ops/README.md

@@ -145,6 +145,16 @@
 | 140  | [torch.addmv](https://pytorch.org/docs/stable/generated/torch.addmv.html?highlight=addmv#torch.addmv) | 无对应实现               |          [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.addmv.md)                                                     |
 | 141  | [torch.addr](https://pytorch.org/docs/stable/generated/torch.addr.html?highlight=addr#torch.addr) | 无对应实现                                                   |              [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.addr.md)    |
 | 142  | [torch.baddbmm](https://pytorch.org/docs/stable/generated/torch.baddbmm.html?highlight=baddbmm#torch.baddbmm) | 无对应实现                                                   |  [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.baddbmm.md)                                                            |
-| 143  | [torch.bmm](https://pytorch.org/docs/stable/generated/torch.bmm.html?highlight=bmm#torch.bmm) | [paddle.bmm](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/bmm_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
+| 143  | [torch.addmm](https://pytorch.org/docs/stable/generated/torch.addmm.html?highlight=addmm#torch.addmm) | [paddle.addmm](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/addmm_cn.html) | 功能一致，参数名不一致，PaddlePaddle未定义`out`参数代表输出Tensor |
+| 144  | [torch.chain_matmul](https://pytorch.org/docs/stable/generated/torch.chain_matmul.html?highlight=chain_matmul#torch.chain_matmul) | 无对应实现                                                   |                           [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.chain_matmul.md)      |
+| 145  | [torch.cholesky_inverse](https://pytorch.org/docs/stable/generated/torch.cholesky_inverse.html?highlight=cholesky_inverse#torch.cholesky_inverse) | 无对应实现                                                   |  [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.cholesky_inverse.md)  |
+| 146  | [torch.cholesky_solve](https://pytorch.org/docs/stable/generated/torch.cholesky_solve.html?highlight=cholesky_solve#torch.cholesky_solve) | 无对应实现                                                   |  [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.cholesky_solve.md)      |
+| 147  | [torch.matmul](https://pytorch.org/docs/stable/generated/torch.matmul.html?highlight=matmul#torch.matmul) | [paddle.matmul](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/matmul_cn.html) |    [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.matmul.md) |
+| 148  | [torch.mm](https://pytorch.org/docs/stable/generated/torch.mm.html?highlight=mm#torch.mm) | [paddle.matmul](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/matmul_cn.html) |     [差异对比](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.mm.md)     |
+| 149  | [torch.mv](https://pytorch.org/docs/stable/generated/torch.mv.html?highlight=mv#torch.mv) | 无对应实现                                                   | [组合实现](https://github.com/PaddlePaddle/X2Paddle/tree/develop/docs/pytorch_project_convertor/API_docs/ops/torch.mv.md)  |
+
+
+
+
 
 ***持续更新...***

docs/pytorch_project_convertor/API_docs/ops/torch.chain_matmul.md

+## torch.chain_matmul
+### [torch.chain_matmul](https://pytorch.org/docs/stable/generated/torch.chain_matmul.html?highlight=chain_matmul#torch.chain_matmul)
+```python
+torch.chain_matmul(*matrices, out=None)
+```
+###  功能介绍
+用于实现多个矩阵相乘，PaddlePaddle目前无对应API，可使用如下代码组合实现该API。
+```python
+import paddle
+
+def chain_matmul(*matrices, out=None):
+    assert len(matrices) >= 1, "Expected one or more matrices."
+    if len(matrices) == 1:
+        return matrices[0]
+    out = paddle.matmul(matrices[0], matrices[1])
+    for i in range(2, len(matrices)):
+        out = paddle.matmul(out, matrices[i])
+    return out
+```
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.cholesky_inverse.md

+## torch.cholesky_inverse
+### [torch.cholesky_inverse](https://pytorch.org/docs/stable/generated/torch.cholesky_inverse.html?highlight=cholesky_inverse#torch.cholesky_inverse)
+```python
+torch.cholesky_inverse(input, upper=False, out=None)
+```
+
+###  功能介绍
+用于计算对称正定矩阵的逆矩阵，公式为：   
+> 当`upper`为False时，  
+> $inv=(uu^T)^{-1}$ ；  
+> 当`upper`为True时，  
+> $inv=(u^Tu)^{-1}$ 。  
+
+
+PaddlePaddle目前无对应API，可使用如下代码组合实现该API。
+
+```python
+import paddle
+
+def cholesky_inverse(input, upper=False, out=None) :
+    u = paddle.cholesky(input, False)
+    ut = paddle.transpose(u, perm=[1, 0])
+    if upper:
+        out = paddle.inverse(paddle.matmul(ut, u))
+    else:
+        out = paddle.inverse(paddle.matmul(u, ut))
+    return out
+```
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.cholesky_solve.md

+## torch.cholesky_solve
+### [torch.cholesky_solve](https://pytorch.org/docs/stable/generated/torch.cholesky_solve.html?highlight=cholesky_solve#torch.cholesky_solve)
+```python
+torch.cholesky_solve(input, input2, upper=False, out=None)
+```
+
+###  功能介绍
+用于计算对称正定矩阵的逆矩阵，并与另一个矩阵相乘，公式为：   
+> 当`upper`为False时，  
+> $inv=(uu^T)^{-1}b$ ；  
+> 当`upper`为True时，  
+> $inv=(u^Tu)^{-1}b$ 。 
+
+PaddlePaddle目前无对应API，可使用如下代码组合实现该API。
+
+```python
+import paddle
+
+def cholesky_solve(input, input2, upper=False, out=None) :
+    u = paddle.cholesky(input, False)
+    ut = paddle.transpose(u, perm=[1, 0])
+    if upper:
+        out = paddle.inverse(paddle.matmul(ut, u))
+    else:
+        out = paddle.inverse(paddle.matmul(u, ut))
+    out = paddle.matmul(out, input2)
+    return out
+```
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.matmul.md

+## torch.matmul
+### [torch.matmul](https://pytorch.org/docs/stable/generated/torch.matmul.html?highlight=matmul#torch.matmul)
+```python
+torch.matmul(input, other, out=None)
+```
+
+### [paddle.matmul](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/matmul_cn.html)
+```python
+paddle.matmul(x, y, transpose_x=False, transpose_y=False, name=None)
+```
+
+### 参数差异
+| PyTorch       | PaddlePaddle | 备注                                                   |
+| ------------- | ------------ | ------------------------------------------------------ |
+| input           | x            | 表示输入的第一个Tensor。               |
+| other        | y            | 表示输入的第二个Tensor。             |
+| -           | transpose_x            | 表示相乘前是否转置x，PyTorch无此参数。               |
+| -        | transpose_y            | 表示相乘前是否转置y，PyTorch无此参数。             |
+| out          | -        | 表示输出的Tensor，PaddlePaddle无此参数。  |

docs/pytorch_project_convertor/API_docs/ops/torch.mm.md

+## torch.mm
+### [torch.mm](https://pytorch.org/docs/stable/generated/torch.mm.html?highlight=mm#torch.mm)
+```python
+torch.mm(input, mat2, *, out=None)
+```
+### [paddle.matmul](https://www.paddlepaddle.org.cn/documentation/docs/zh/api/paddle/matmul_cn.html)
+```python
+paddle.matmul(x, y, transpose_x=False, transpose_y=False, name=None)
+```
+
+### 参数差异
+| PyTorch       | PaddlePaddle | 备注                                                   |
+| ------------- | ------------ | ------------------------------------------------------ |
+| input           | x            | 表示输入的第一个Tensor。               |
+| other        | y            | 表示输入的第二个Tensor。             |
+| -           | transpose_x            | 表示相乘前是否转置x，PyTorch无此参数。               |
+| -        | transpose_y            | 表示相乘前是否转置y，PyTorch无此参数。             |
+| out          | -        | 表示输出的Tensor，PaddlePaddle无此参数。  |
+
+
+### 功能差异
+
+#### 计算方式
+***PyTorch***：只支持$n × m$的矩阵与$m × p$的矩阵相乘。  
+***PaddlePaddle***：支持的输入与`torch.matmul`相同。
\ No newline at end of file

docs/pytorch_project_convertor/API_docs/ops/torch.mv.md

+## torch.mv
+### [torch.mv](https://pytorch.org/docs/stable/generated/torch.mv.html?highlight=mv#torch.mv)
+```python
+torch.mv(input, vec, out=None)
+```
+
+###  功能介绍
+用于实现矩阵（`input`，大小为$n × m$）与向量（`vec`, $m$）相乘，PaddlePaddle目前无对应API，可使用如下代码组合实现该API。
+```python
+import paddle
+
+def mv(input, vec, out=None):
+    vec = paddle.unsqueeze(vec, 1)
+    out = paddle.matmul(input, vec)
+    out = paddle.squeeze(out, 1)
+    return out
+```
\ No newline at end of file