How do I derive an equations of weight updating ?

[terasakisatoshi]

I'm reading the article for CSPNet: A New Backbone that can Enhance Learning Capability of CNN.

It is not quite clear Equation (6) shown the image below:

Ho did you derive the equation (6)?
Also it's not clear the definition of g_i represents the gradient propagated to the i^th dense layer. Could you explain more detail?

Thank you.

[terasakisatoshi]

I'm not sure this is right???

[xarryon]

I think so and the gradient of Wi can be computed by: dLoss/dwi=gi(dxi-1/dwi)