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The derivation constraints for $c_2=-z_3$ $\phi^4$ periods
Let $G$ be a primitive log-divergent $\phi^4$ graph with loop number $h_G$ and $c_2(G)=-z_3$ , and let $\delta_m$ be the derivation with respect to the modified parity basis in the…
openfeynman-periods galois-coaction multiple-polylogarithms
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The derivation constraints for c2=−z3c_2=-z_3c2​=−z3​ ϕ4\phi^4ϕ4 periods