Arnold Schwarzenegger | Arnold Schoenberg | Benedict Arnold | Arnold Palmer | Arnold Bax | Matthew Arnold | Eddy Arnold | Hey Arnold! | Henry H. Arnold | David Arnold | Arnold Wesker | Thomas Arnold | Arnold Toynbee | Arnold Rothstein | Arnold Friberg | Arnold Dreyblatt | Arnold Bennett | Arnold Sommerfeld | Richard R. Arnold | Goldbach's conjecture | Arnold Moss | Arnold Fanck | Arnold Böcklin | Arnold Arboretum | Arnold | Johnny Arnold | Frances Arnold | Arnold Zweig | Arnold Vosloo | Arnold Rüütel |
Their intersections display rigidity properties not possessed by smooth manifolds; the Arnold conjecture gives the sum of the submanifold's Betti numbers as a lower bound for the number of self intersections of a smooth Lagrangian submanifold, rather than the Euler characteristic in the smooth case.