Helmholtz was aware of the topological ideas in his paper, particularly the fact that the region outside a vortex tube was multiply connected which led him to consider many-valued potential functions.
Helmholtz ay kamalayan ng topological ideya sa kanyang papel, lalo na ang katunayan na ang mga rehiyon sa labas ng puyo ng tubig tube ay multiply connected na humantong sa kanya upang isaalang-alang ang maraming mga potensyal na-mahal function.