EULER: a generalization of ALGOL and it formal definition: Part 1
Communications of the ACM
A Fast-Parsing Scheme for Hand-Printed Mathematical Expressions
A Fast-Parsing Scheme for Hand-Printed Mathematical Expressions
A Survey of Interactive Graphical Systems for Mathematics
ACM Computing Surveys (CSUR)
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SHAPESHIFTER shows graphically the effects of various transformations applied to a set of points in the complex plane. The user prints in his own handwriting a formula or series of formulas which serves as the real-time input to the program. By experimentally changing the transformation he can gain an understanding, difficult to achieve formally, of its general properties, the effects of parameters and signs, the location and nature of singular points, conformality, etc.