Editing mathematical formulae

An editor is described whose purpose is to assist in preparing and printing complex mathematical formulae. A picture of the current formula is displayed on a screen, and changes are made by manipulating the picture. The user may introduce mathematical entities such as fractions and integrals, and their sizes and layouts are adjusted automatically by the editor. A prototype implementation is described.

[1]  Michael Levison A programmable text‐editing system , 1982, Softw. Pract. Exp..