Showing 2026Show all
2 papers · 1 filter
math.CO2026
Half-flips are 5-avoidable
Pascal Ochem
A word contains a \emph{half-flip} if it contains non-empty factors and where . Fici reports a non-constructive proof of the existence of an infinite word over a…
math.CO2026
Pairs of square-free arithmetic progressions in infinite words
Thomas Delépine, Pascal Ochem, Matthieu Rosenfeld
We study a question of Harju from 2019 regarding the existence of infinite ternary square-free words whose subsequences modulo and are also square-free for relatively prime…