easygraph.nn.convs.hypergraphs.dhcf_conv module

class easygraph.nn.convs.hypergraphs.dhcf_conv.JHConv(*args: Any, **kwargs: Any)

Bases: Module

The Jump Hypergraph Convolution layer proposed in Dual Channel Hypergraph Collaborative Filtering paper (KDD 2020).

Matrix Format:

\[\mathbf{X}^{\prime} = \sigma \left( \mathbf{D}_v^{-\frac{1}{2}} \mathbf{H} \mathbf{W}_e \mathbf{D}_e^{-1} \mathbf{H}^\top \mathbf{D}_v^{-\frac{1}{2}} \mathbf{X} \mathbf{\Theta} + \mathbf{X} \right).\]

Parameters:

• in_channels (int) – \(C_{in}\) is the number of input channels.

• out_channels (int) – \(C_{out}\) is the number of output channels.

• bias (bool) – If set to False, the layer will not learn the bias parameter. Defaults to True.

• use_bn (bool) – If set to True, the layer will use batch normalization. Defaults to False.

• drop_rate (float) – If set to a positive number, the layer will use dropout. Defaults to 0.5.

• is_last (bool) – If set to True, the layer will not apply the final activation and dropout functions. Defaults to False.

forward(X: torch.Tensor, hg: Hypergraph) → torch.Tensor

The forward function.

Parameters:

• X (torch.Tensor) – Input vertex feature matrix. Size \((N, C_{in})\).

• hg (eg.Hypergraph) – The hypergraph structure that contains \(N\) vertices.