bibkey: olliswillmott2011twizzler
authors: M. A. Ollis and D. T. Willmott
year: 2011
title: On twizzler, zigzag and graceful terraces
doi: null
url: https://ajc.maths.uq.edu.au/pdf/51/ajc_v51_p243.pdf
claim: Section 2 supplies the Walecki and block-reversal twizzler constructions; Table 1 includes the five-entry graceful tail used by the rotational column construction.
strata_touched:
  - D5/S1/Words/Sequenceability/RotationalColumnTriple
license: citation-only
triage: anchor

On twizzler, zigzag and graceful terraces

M. A. Ollis and D. T. Willmott, Australasian Journal of Combinatorics 51 (2011), 243–257, Section 2 and Table 1.

The Walecki and twizzler constructions are published methods, not new results of this repository. The five-entry tail is a shifted reversal of the Table 1 path (1,4,0,2,3). The column supplier verifies the exact formulas and their inventories internally, including the directed middle and closing edges and the locations of the additive triples. An undirected rotational terrace alone does not supply those directed clauses.

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Verified locator

https://ajc.maths.uq.edu.au/pdf/51/ajc_v51_p243.pdf