In effective loop quantum gravity, an infinite family of mathematically equivalent collapse equations produce different weak solutions after shell crossing, so the predicted black hole lifetime (e.g., M^2, M^3, M^4) is not uniquely determined.
This comes from having required that the interior is almost homogeneous
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Non-uniqueness of the shockwave dynamics in effective loop quantum gravity
In effective loop quantum gravity, an infinite family of mathematically equivalent collapse equations produce different weak solutions after shell crossing, so the predicted black hole lifetime (e.g., M^2, M^3, M^4) is not uniquely determined.