A Appendix: Variational Lower Bound
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چکیده
:= F̂ − KL (q(X|Z) ‖ p(X)) . At this point, our variational bound is similar to the one of equation (7), but the first term, here denoted as F̂ , refers to the expanded probability space and, thus, involves the inducing inputs and the additional variational distribution q(U). Since the second term (the KL term) is tractable (because it only involves Gaussian distributions), we are now going to focus on the F̂ term. By breaking the logarithm again, we can further write this term as:
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