  Given the nature of Trendelenburg’s presentation of the Leibnizian system, his significance for the mathematical reception of Leibniz’s ideas in the context of the emergence of formal mathematics and mathematical logic in the second half of the 19th century is astonishing. Trendelenburg’s paper on Leibniz’s program of a general characteristic became a point of reference for logical pioneers such as Gottlob Frege and Ernst Schröder (on their controversy cf. Peckhaus 1997, 287–296). 