The 'EinStein' aperiodic 'Spectre' tile [Le pavé 'Spectre' apériodique 'EinStein'].
The discovery of the "EinStein" tiling of the plane by means of the "Spectre" monotile is due to
David Smith, Joseph Samuel Myers, Craig Kaplan and Chaim Goodmann-Strauss (05/2023).