3 Generalized Cumulants 61 3.1 Introduction and definitions 61 3.2 The fundamental identity for generalized cumulants 62 3.3 Cumulants of homogeneous polynomials 64 3.4 Polynomial transformations 65 3.5 Complementary set partitions 68 3.5.1 Equivalence classes 68 3.5.2 Symbolic computation 69 3.6 Elementary lattice theory 70 3.6.1 Generalities 70 3.6.2分区晶格的m obius功能72 3.6.3包含 - 排斥和二进制晶格74 3.6.4累积和分区晶格75 3.6.5累积的进一步关系77 3.7一些示例77 3.7一些涉及线性模型80 3.8累积空间82 3.9 Gaussian Momments 82 Rysents 85 3.9.19.1.1 issers85。拉普拉斯近似88 3.10.1两人分期膨胀88 3.10.2正式拉普拉斯扩张89 3.11书目注释90 3.12进一步的结果和练习3 92