I understand some parts of the theory, I've read from here https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Supplemental_Modules_(Astronomy_and_Cosmology)/Cosmology/Carlip/Hawking_Radiation
What exactly is negative energy and how is it different from the "negative" or "positive" we use when talking about an electron or a proton? Why can negative energy only exist inside the blackhole?
