How can one visualize Theorem 4.2 on page 31 of this paper by Seregin, Silvestre, Šverák and Zlatoš?
On the other hand, I have a clear visualization of a related result about how oscillation decay implies Hölder regularity (which is illustrated, for example, in Figure 2.2 on page 30 of Fernández-Real and Ros-Oton's lecture notes).
