FeynCalc manual (development version)

OPESumExplicit

OPESumExplicit[exp] calculates OPESums.

See also

Overview, OPESum, OPESumSimplify.

Examples

OPESum[A^iB^(m - i - 3), {i, 0, m - 3}] 
 
OPESumExplicit[%]

\sum _{i=0}^{-3+m} A^{\text{iB}^{-3-i+m}}

\sum _{i=0}^{-3+m} A^{\text{iB}^{-3-i+m}}

OPESum[a^ib^(j - i) c^(m - j - 4), {i, 0, j}, {j, 0, m - 4}] 
 
OPESumExplicit[%] 
  
 

\sum _{j=0}^{-4+m} \;\text{}\;\text{} (j+1)c^{-j+m-4} a^{\text{ib}^{j-i}}

\sum _{j=0}^{-4+m} \;\text{}\;\text{} (j+1)c^{-j+m-4} a^{\text{ib}^{j-i}}