Program, information storage medium, and recognition device

Provided is a recognition device or the like which is capable of recognizing mathematical formulae including character strings. This recognition device includes: a registration unit which determines whether inputted strokes or stroke strings correspond to a specific gesture for demarcating a character string and a mathematical formula, and, in cases when the inputted strokes or stroke strings are determined to correspond to the specific gesture, registers information related to the range specified by the specific gesture; a demarcation unit which sets, as strokes corresponding to the character string, the strokes included in the range specified by the specific gesture among the inputted strokes, and sets, as strokes corresponding to the mathematical formula, the strokes not included in the range specified by the specific gesture; and a recognition unit which uses a character-string-recognition engine to recognize the character string from the strokes set as the strokes corresponding to the character string, a