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# tfp.vi.squared_hellinger

The Squared-Hellinger Csiszar-function in log-space.

A Csiszar-function is a member of,

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

The Squared-Hellinger Csiszar-function is:

``````f(u) = (sqrt(u) - 1)**2
``````

This Csiszar-function induces a symmetric f-Divergence, i.e., `D_f[p, q] = D_f[q, p]`.

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

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

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