Thorne, Kip, Black Holes and Time Warps: Einstein's Outrageous Legacy, W. W. Norton & Company; Reprint edition, January 1, 1995.
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The Hoop Conjecture, proposed by Kip Thorne in 1972, states that an imploding object forms a black hole when, and only when, a circular hoop with a specific critical circumference could be placed around the object and rotated.
Hoop Dreams | Goldbach's conjecture | Jesca Hoop | ''n''! conjecture | n! conjecture | Kato's conjecture | Hoop-La | Calabi conjecture | Weil conjecture | ''Uncle Petros and Goldbach's Conjecture'' by Apostolos Doxiadis | Uncle Petros and Goldbach's Conjecture | Street Hoop | Schanuel's conjecture | Pollock's conjecture | Op Hoop van Zegen | Mumford conjecture | Kepler conjecture | Jaap de Hoop Scheffer | Hula hoop | hoop | Heawood conjecture | Chang's conjecture | Catalan's conjecture | Blattner's conjecture | Beal's conjecture | Aerial hoop |