bijx.Frozen

class bijx.Frozen

Bases: Bijection

Wrapper to screen internal parameters from training.

To be used in conjunction with FrozenFilter.

Parameters:

bijection (Bijection) – The bijection to freeze.

Note

The use of this wrapper comes purely from using it in conjunction with a filter; the internal parameters of the bijection module are not modified in any way.

__init__(bijection)

Parameters:

bijection (Bijection)

Methods

forward(x, log_density, **kwargs)	Apply forward transformation.
invert()	Create an inverted version of this bijection.
reverse(x, log_density, **kwargs)	Apply reverse (inverse) transformation.

forward(x, log_density, **kwargs)

Apply forward transformation.

Transforms input through the bijection and updates log-density according to the change of variables formula.

For convenience Bijection() gives the default identity bijection.

Parameters:

• x – Input data of any pytree structure.

• log_density – Log density values corresponding to the input.

• **kwargs – Additional transformation-specific arguments.

Returns:

Tuple of (transformed_data, updated_log_density) where the log-density incorporates the log absolute determinant of the transformation Jacobian.

reverse(x, log_density, **kwargs)

Apply reverse (inverse) transformation.

Transforms input through the inverse bijection and updates log-density accordingly.

Parameters:

• x – Input data of any pytree structure.

• log_density – Log density values corresponding to the input.

• **kwargs – Additional transformation-specific arguments.

Returns:

Tuple of (inverse_transformed_data, updated_log_density) where the log-density change has the opposite sign compared to forward().