Abstract
If s and t are relatively prime integers, J.B. Olsson proved in (J. Comb. Theory, Ser. A 116:733–740, 2009) that the s-core of a t-core partition is again a t-core partition, and that the s-bar-core of a t-bar-core partition is again a t-bar-core partition. Here generalised results are proved for partitions and bar partitions when the restriction that s and t be relatively prime is removed.
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Gramain, JB., Nath, R. On core and bar-core partitions. Ramanujan J 27, 229–233 (2012). https://doi.org/10.1007/s11139-011-9309-y
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DOI: https://doi.org/10.1007/s11139-011-9309-y