All-American Girls Professional Baseball League rules of play All-American Girls Professional Baseball League rules of play The All-American Girls Professional Baseball League was a circuit that began to operate in 1943. Since the only organized ball for women in the United States was softball, the league officials created a hybrid game which included features of both fast-pitch softball and baseball. Compared to softball, the crucial differences were that nine (not ten) players were used, and runners could lead off, slide and steal bases. In its twelve years of history the All-American Girls Professional Baseball League evolved through many stages. These differences varied from the beginning of the league,
Yoshida Mitsuyoshi Yoshida Mitsuyoshi , also known as Yoshida Kōyū, was a Japanese mathematician in the Edo period. His popular and widely disseminated published work made him the most well known writer about mathematics in his lifetime. He was a student of Kambei Mori (also known as Mōri Shigeyoshi). Along with Imamura Chishō and Takahara Kisshu, Yoshida became known to his contemporaries as one of "the Three Arithmeticians." Yoshida was the author of the oldest extant Japanese mathematical text. The 1627 work was named "Jinkōki". The work dealt with the subject of soroban arithmetic, including square and cube root operations. In a