The zero-bubble (also written as "0-bubble" or "0b") is a bubble shapeframe with no inflatons (scalar fields responsible for blowup from a single point). A 0b is called a totally twisted loop, and marks the completion of a proof.

As an optimal structure, a 0-bubble is the ideal cent validation for a closed string (and thus, a fibor). Taken by themselves, zero-bubbles are considered solved puzzles.

See also

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