**Handwriting Interface for Computer
Algebra Systems**

*H. Okamura*

*T. Kanahori*

*M. Suzuki*

suzuki@math.kyushu-u.ac.jp

Graduate School of Mathematics

**Kyushu University**

*R. Fukuda*

rfukuda@cc.oita-u.ac.jp

Faculty of Engineering

**Oita University**

*W. Cong, F. Tamari*

tamari@fukuoka-edu.ac.jp

Faculty of Education,

**Fukuoka University of Education**

Japan

### Abstract

This paper describes our experimental real time recognition system of handwritten mathematical expressions, linked to a computer algebra system Mathematica by Mathlink. This system is titled as “INFTY". The fundamental operations of INFTY are (1) input of mathematical expressions using handwriting input system, (2) editing of them by basic editing operation (cut, copy, paste and delete) and (3) calculations and plotting graphs using Mathematica. INFTY also supports the input and output by TeX format.

In the handwriting window, we adopt the automatic character rewriting method. This method largely improves the accuracy of the structure analysis of the written mathematical expressions.

?1999.ATCM, Inc.