We give a survey of the Lagrange inversion formula, including different versions and proofs, with applications to combinatorial and formal power series identities.

Unsupervised learning is one type of machine with an exceptionally high number applications in various fields. The most popular and best-known group unsupervised methods clustering methods. main goal to find hidden relationships between individual observations. There great interest different density estimation methods, especially when there are outliers the data. Density also can be applied dat...