I have read this question:
Equations of fundamental physics are usually time-reversible (particle physics is time-reversible in a CP or CPT sense, though) which means you can take a certain reversal of the solution of your equations to obtain another solution. A white hole is a complementary object to a black hole in this sense. Every particle in it's field behaves the same as a particle near a black hole only with a reversed arrow of time.
And this one:
Thermodynamics forbids the splitting of a black hole in multiple smaller black holes. Reason being that the result of such a splitting would violate the first law of thermodynamics (energy conservation) and/or the second law of thermodynamics (entropy non-decrease).
So basically, black holes do merge, we have experimental evidence for that, but on this site it is said that they cannot split. Does this mean that white holes can (because they are time reversed black holes) only split but cannot merge?
- If white holes are just time reversed black holes, then can they split just not merge?