Mathematics MOC Formal calculus MOC Formal sum Formal sums over a vector space Formal sums over endomorphisms Formal sums over a Lie algebra Normal ordered product Formal operators Formal derivative Degree operator on formal sums over a vector space Special formal sums Formal delta Formal exponential Formal logarithm Formal binomial expansion Bibliography 1988. Vertex operator algebras and the Monster, §2, pp. 47–60 develop | en | sembr