Japanese Mahjong Japanese Mahjong Japanese Mahjong (Japanese: 麻雀, 麻将 or マージャン; "mājan"), also known as Rīchi Mahjong, is a variation of mahjong. While the basic rules to the game are retained, the variation features a unique set of rules such as "rīchi" and the use of "dora". The main mahjong article contains general terms, but only English and Japanese terms are used here. Terms like "chow," "pung," and "kong" are not used in this variation, yet their functions are still used. Instead, they are referred to in Japanese as "chī", "pon", and "kan". In 1924, a soldier named Saburo Hirayama brought the
Chow group varieties, Chow groups can have richer behavior. For example, let "X" be an elliptic curve over a field "k". Then the Chow group of zero-cycles on "X" fits into an exact sequence Thus the Chow group of an elliptic curve "X" is closely related to the group "X"("k") of "k"-rational points of "X". When "k" is a number field, "X"("k") is called the Mordell–Weil group of "X", and some of the deepest problems in number theory are attempts to understand this group. When "k" is the complex numbers, the example of an elliptic curve shows that Chow groups can be