## Notation of Transposed Convolution Operation in Equation

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How do I notate a transposed convolution operation (as it is used in deep learning), in a math equation?

A convolution operation for example is often notated as $$\hat{y} = x \circledast W$$ where $$W$$ is the weight and $$x$$ the input. Is there a similar notation of the transposed convolution operation?