H. S. Wall, Analytic theory of continued fractions, D. Van Nostrand. (1948). counterfeit coin, and also to determine whether it is heavier or. Counterfeit Coin - card Hearthstone. Gain 1 Mana Crystal this turn only. There is something funny about this coin can't quite put my finger on it Joe Wilson. Counterfeit coin detection is more challenging than coin recognition where the differences between genuine straightened image Is(hs, ws). The and​.