Calculation of Gromov-Witten invariants for $C{P}^3,C{P}^4$,and $Gr(2,4)$

Masao Jinzenji, Yi Sun

Using the associativity relations of the topological Sigma Models with target spaces, $C{P}^3,C{P}^4$ and $Gr(2,4)$ , we derive recursion relations of their correlation and evaluate t…