The discussion revolves around the creation of a new mathematical symbol, specifically an integral sign with a square contour, using the command \sqint from the pxfonts package. Participants share variations of the integral with different spacing and express enthusiasm for the new symbol. There is also curiosity about the potential for animating the symbol in LaTeX, including ideas like the square moving over the integral sign. A question arises about using a negative sign to position the square differently, leading to further exploration of the symbol's appearance. Overall, the thread showcases a collaborative effort to innovate within mathematical notation.