VERB + APERIODIC
discovered
APERIODIC + NOUN
monotile, tessellations
PREP.
in
ADV.
finally
adj
That does not recur periodically.
aperiodic tiling
That does not have a periodic vibration
for which any return to it may occur at irregular times; not periodic.
adjective — not recurring at regular intervals
Mathematicians have finally discovered an aperiodic monotile, that is, a polygon that can only tile the plane in aperiodic tessellations.