Definition: Tergerg is a term used in mathematics to denote a linear transformation. It refers to a function that maps vectors in n-dimensional Euclidean space onto themselves, and it's often denoted as T or R^n. A tengerg can be thought of as a vector-valued function that takes a point (x,y,z,w) in the n-dimensional space as its input and returns a point (x',y',z',w') in the same n-dimensional space as its output.