Update math/gf8192/gf8192.go

Co-authored-by: Armando Faz <armfazh@users.noreply.github.com>

Author: whyvl

math/gf8192/gf8192.go

@@ -114,11 +114,11 @@ func sqr2Mul(a, b Gf) Gf {
 
 // Inv calculates the multiplicative inverse of Gf element a
 func Inv(a Gf) Gf {
-	return Div(a, 1)
+	return Div(1, a)
 }
 
 // Div calculates a / b
-func Div(b, a Gf) Gf {
+func Div(a, b Gf) Gf {
 	tmp3 := sqrMul(b, b)         // b^3
 	tmp15 := sqr2Mul(tmp3, tmp3) // b^15 = b^(3*2*2+3)
 	out := sqr2(tmp15)