This speculation baffled many scientists as no one had ever seen an object with just 2 equilibrium points. While there were strong indications that this minimal number should be 4, one of the greatest mathematicians of the 20th century, Vladimir Igorevich Arnold, thought otherwise and suggested in 1995 that the minimal number may be 2. How few equilibrium points can a single solid object have? Although the study of the number and location static equilibrium points in rigid bodies dates back to the time of Archimedes, one of the most fundamental questions on the subject has remained open until very recently.
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