We solve the closed Schwinger–Dyson equation for the 2-point function of a tensor field theory with a quartic melonic interaction, in terms of Lambert’s W function, using a perturbative expansion and Lagrange–Bürmann resummation. Higher-point functions are then obtained recursively.

中文翻译：

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一个可解的张量场理论

我们使用微扰展开和拉格朗日-Bürmann 求和，根据 Lambert 的 W 函数求解具有四次瓜子相互作用的张量场理论的 2 点函数的封闭 Schwinger-Dyson 方程。然后递归地获得更高点的函数。