Parallelogram substring scale: Difference between revisions
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== Open problems == | == Open problems == | ||
# Classify all MOS-substitution quasi-parallelogram scales. | # Classify all MOS-substitution quasi-parallelogram scales. | ||
# Classify all ternary quasi-parallelogram scales. Conjecture: All ternary quasi-parallelogram scales are MOS substitution scales. | # Classify all ternary quasi-parallelogram scales. <s>Conjecture: All ternary quasi-parallelogram scales are MOS substitution scales.</s> (counterexample: 5sL/5sR diachrome is 2-row QP) | ||
[[Category:Pages with open problems]] | [[Category:Pages with open problems]] | ||