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18 changes: 13 additions & 5 deletions paddle/operators/bilinear_tensor_product_op.cc
Original file line number Diff line number Diff line change
Expand Up @@ -77,11 +77,19 @@ class BilinearTensorProductOpMaker : public framework::OpProtoAndCheckerMaker {
AddOutput("Out", "The output of bilinear_tensor_product operator.");
AddComment(R"DOC(
Bilinear Tensor Product operator.
Given input X and Y, a 3D tensor weight, and bias. Each column of the
output is computed by one slice i = 1, . . . , k of the tensor:

M = (X W_i) \cdot Y
Out_i = \sum_i {M_i} + Bias_i
Given input X and Y, a 3D tensor Weight and a Bias. Each column of the
Output is computed by one slice $i = 1, . . . , k$ of the tensor:

$$
M = (X W_i) * Y \\
Out_i = \sum_j {M_j} + Bias_i
$$

Where $W_i$ is the $i$-th slice of Input(Weight);
$M_j$ is the $j$-th column of $M$;
$Out_i$ is the $i$-th column of Output(Out);
$Bias_i$ is a column vector, each element of it is equal to
the $i$-th element of $Bias$;

)DOC");
}
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