     =     {0\over 0}     \phi_{\pmb{p},\pmb{h},G}     \big(     \mathds{0}_{\{x\not\leftrightarrow y\}}     \cdot     \tanh\left(\pmb{h}(K_t)\right)     \cdot      \tanh\left(\pmb{h}(K_u)\right)     \big).