/**
 * Returns the sign of the given expansion.
 *
 * * see [Shewchuk](https://people.eecs.berkeley.edu/~jrs/papers/robustr.pdf)
 *
 * From Shewchuk: "A nonoverlapping expansion is desirable because it is easy to
 * determine its sign (take the sign of the largest component) ... "
 *
 * @param e A floating point expansion with zeroes eliminated.
 */
declare function eSign(e: number[]): number;
export { eSign };