A note on two orthogonal totally $$C_4$$-free one-factorizations of complete graphs
2021
A pair of orthogonal one-factorizations $${\mathcal {F}}$$
and $${\mathcal {G}}$$
of the complete graph $$K_n$$
is totally $$C_4$$
-free, if the union $$F\cup G$$
, for any $$F,G\in {\mathcal {F}}\cup {\mathcal {G}}$$
, does not include a cycle of length four. In this note, we prove that, if $$q\equiv 3$$
(mod 4) is a prime power with $$q\ge 11$$
, then there is a pair of orthogonal totally $$C_4$$
-free one-factorizations of $$K_{q+1}$$
.
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