A periodic approach to plane partition congruences

Ramanujan’s celebrated congruences of the partition function $p(n)$ have inspired a vast amount of results on various partition functions. Kwong’s work on periodicity of rational polynomial functions yields a general theorem used to establish congruences for restricted plane partitions. This theorem provides a novel proof of several classical congruences and establishes two new congruences. We additionally prove several new congruences which do not fit the scope of the theorem, using only elementary techniques, or a relationship to existing multipartition congruences.