COMMENTS ON OTHERS:
This paper presents MathPad2, a prototype application for creating mathematical sketches. MathPad2 incorporates a novel gestural interaction paradigm that lets users modelessly create handwritten mathematical expressions using familiar math notation and free-form diagrams, including associations between then two, with only a stylus.
According to authors, Mathematical sketching is the process of making simple illustrations from a combination of handwritten 2D mathematical expressions and sketched diagrams. Combining mathematical expressions with diagram elements, called an association, is done either implicitly using diagram labels as input to an inferencing engine or manually using a simple gestural user interface.
It is hard to understand the novelty of the work other than using a gesture recognition system applied towards identifying mathematical expressions. Most of the gestures used for the work are of hackneyed nature, and the use of lasso capability to group stands as something original. In my personal opinion, the work is more of a functionality of a regular character recognition system and gestures are just used to trigger an execution of a function processing, or combining, or editing/deleting.