関連ワード:
who first used the pi symbol who first used the pi symbol in 1706 who first introduced the pi symbol which mathematicians first used the pi symbol who first used the pi symbol to represent pi name the person who first used the symbol pi in 1706 who created the pi symbol the person who first used the symbol for pi in 1706 what nationality was the first scientist who used the pi symbol the person who first used the symbol π for pi in 1706
