Add Inverse and Identity#64
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lockwo
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should be tested with more complicated bijector than just identity
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- Simplify Identity's forward/inverse log-det computation to jax.tree.map per lockwo's suggestion. - Test Inverse with a non-trivial bijector (ScalarAffine), not just Identity.
Identity is a no-op bijector (y = x). Inverse wraps another bijector, swapping its forward/inverse and forward/inverse log-det Jacobian directions, validating that the wrapped bijector's constant-jacobian flags are internally consistent.
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Implements the simple utility Inverse and Identity bijectors.