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SyTen
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SyTen
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Function which, when passed a reference to this input node, an index j into this ComputeNode input nodes input_number and a result tensor ID R with respect to which to build the adjoint, i.e. constructs.
\[ \sum_{i \in \mathrm{children}(\mathtt{output\_nodes})}\left[ \frac{\mathtt{d}\;R}{\mathrm{d}\;\mathtt{out}_i} \frac{\partial \mathtt{out}_i}{\mathtt{in}_j} \right] \]
where the sum is equivalent to the adjoint of the input with respect to this sub-tree of the calculation and the first part of the product is equivalent to the adjoint of the respective output tensor.
This function will never be called with an input_number exceeding the input_nodes vector of this node, instead, 0 will be returned beforehand.
Referenced by get_input_adjoint().
1.9.4