ExtendedGreatestCommonDivisorL function
Fully qualified name: Std.Math.ExtendedGreatestCommonDivisorL
function ExtendedGreatestCommonDivisorL(a : BigInt, b : BigInt) : (BigInt, BigInt)
Summary
Returns a tuple (u,v) such that ua+vb=GCD(a,b) Note: GCD is always positive except that GCD(0,0)=0.