ΔΧΔΡ ≥ ħ

ורנר הייזנברג
עקרון אי הוודאות, 1927

The tiles in Entin Square, which is located at the entrance to Tel Aviv University, include covertions and comments by scientists and other intellectuals.

The current tile presents Heisenberg’s uncertainty principle, which says that it is not possible to simultaneously determine exact values for pairs of variables and is one of the fundamental principles of quantum mechanics.

Three months earlier, the tiles were photographed in the same square. During the photograph, it was discovered that a number of tiles had been removed and replaced by other tiles. The current tile replaced another tile

More details can be found here Click for the item in The ultimate street signs site

Translation of the text on the cover:
ΔΧΔΡ ≥ ħ

Werner Heisenberg
The Uncertainty Principle, 1927