Formula input device, formula input method and program

摘要

A mathematical expression input apparatus includes mathematical expression display means (11; S1-S3) for displaying a mathematical expression, mathematical expression portion designation means (11; SA, A1-A4) for designating a mathematical expression portion displayed by the mathematical expression display means (11; S1-S3) in accordance with user operation, and output means (11; SA, S5) for determining a designation method for a mathematical expression portion designated by the mathematical expression designation means, modifying the mathematical expression in accordance with the designation method, and displaying the modified mathematical expression.