2011/10/31 by Wei, Chuan, Gong, Dianxuan, Li, Jianbo
#Combinatorics (math.CO) #FOS: Mathematics
paper · doi:10.48550/arxiv.1110.6759
In terms of the hypergeometric method, we give the extensions of two known series for π. Further, other twenty-nine summation formulas for π, π2 and 1/π with free parameters are also derived in the same way.