The artwork Positive-Negative by Wolfgang Nestler is located in the park of the university directly at one of the countless paths leading through the park. Two steel plates lie side by side on the ground. Different shapes are cut out of both, which - mirrored at the lower edge - lie next to the object. The work of art was created in 1977 as part of the Stuttgart Federal Garden Show. In the meantime, the steel plates have sunk somewhat into the ground and the work of art is no longer recognizable at first glance. Nevertheless, it has not lost its charm - it has aged in a positive sense.