ityР9РNo-hair TheoremРHair here means plicated (e.g. different styles, colors, perms, etc…). Black holes have no hair because they are simple.?Only three pletely characterize a black hole (Hawking 1972):?mass?angular momentum?electric chargeР10РUnder general physical conditions, the singularity is enclosed by the event horizon. Information within the event horizon cannot be transmitted to the external world. We say the singularity is concealed or dressed. ?Those which are not dressed are called naked singularities.?Mathematically, naked singularities can exist, but physical considerations suggest cosmic censorship: all singularities are enclosed (Roger Penrose).?Hawking bet on cosmic censorship (and conceded too early in 1997).РCosmic Censorship Conjecture: Nature Forbids Naked Singularity
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