One guy is called Xia and he proofed it 1994. (For only 4 objects using a non-constructional proof) Here is a reference for an earlier proof with 5 objects: ht

One guy is called Xia and he proofed it 1994. (For only 4 objects using a non-constructional proof) Here is a reference for an earlier proof with 5 objects: https://en.wikipedia.org/wiki/N-body_problem#cite_note-34 https://en.wikipedia.org/wiki/N-body_problem#cite_note-34 Update: https://en.wikipedia.org/wiki/N-body_problem#Singularities_of_the_n-body_problem https://en.wikipedia.org/wiki/N-body_problem#Singularities_o...