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The Total Variation Csiszar-function in log-space.

A Csiszar-function is a member of,

F = { f:R_+ to R : f convex }.

The Total-Variation Csiszar-function is:

f(u) = 0.5 |u - 1|

logu float-like Tensor representing log(u) from above.
name Python str name prefixed to Ops created by this function.

total_variation_of_u float-like Tensor of the Csiszar-function evaluated at u = exp(logu).