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In page Dido:

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Remembrance of the story of the bull's hide and the foundation of Carthage is preserved in mathematics in connection with the Isoperimetric problem of enclosing the maximum area within a fixed boundary, which is sometimes called Dido's Problem in modern calculus of variations.[14] (Similarly, the Isoperimetric theorem is sometimes called Dido's Theorem.[citation needed]) It is sometimes stated in such discussion that Dido caused her thong to be placed as a half circle touching the sea coast at each end (which would add greatly to the area) but the sources mention the thong only and say nothing about the sea.