A Csiszar-function is a member of F = { f:R_+ to R : f convex }.
vi_total_variation(logu, name = NULL)total_variation_of_u: float-like Tensor of the Csiszar-function
evaluated at u = exp(logu).
float-like Tensor representing log(u) from above.
name prefixed to Ops created by this function.
The Total-Variation Csiszar-function is:
f(u) = 0.5 |u - 1|
Warning: this function makes non-log-space calculations and may therefore be
numerically unstable for |logu| >> 0.
Other vi-functions#':
vi_t_power(),
vi_triangular()