Hierarchical addressing in symbolic computation

AbstractTo facilitate symbolic computation that parallels the traditional style of mathematical physics, we report some notations and supporting software, based on Mathematica,11Mathematica is a trademark of Wolfram Research, Inc. that let a user specify parts of a mathematical expression to be altered in situ. The scheme is mnemonic and easily extended. It evolved in the course of some lengthy symbolic computations that applied a variety of mathematical techniques to several areas of study, and bears also on a number of more general and abstract topics that affect the manipulation of mathematical and other symbolic material and text