The regenerative loopmotif is a motif found in some catalysts where a loop motif that has been perturbed in a certain way hits a block then restores itself.
Pi splitter
Pi splitter is a representative converter with a regenerative loop motif. It was originally found by Ivan Fomichev with Bellman in August 2013[1] and subsequently reduced by Martin Grant. It is a constellation consisting of a block and an unnamed 27-cell still life. Its name originates from the fact that a pi-heptomino can be splitted into two gliders in a reaction shown to the left, with systematic label PNE−6T40_SE−6T40.
Later this catalyst is generalized to a replacement catalyst for the tub when it is turned into a certain block predecessor. Shown to the right below are two example catalyses; the first was used in both a period-36 honey farm hassler and a G4 receiver, while the second was used in a variant of p124 lumps of muck hassler. However, both oscillators can be reduced with other catalysts.