quaeratin/src/double-expansion/e-sign.ts

An extended precision floating point library (as per Shewchuk) - precision only limited by overflow / underflow

/**
 * 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.
 */
function eSign(e: number[]) {
    return e[e.length-1];
}


export { eSign }