Graviton

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The graviton is the comma 129140163/128000000 = |-13 17 -6>. It is equal to (81/80)^4/(25/24), (81/80)^2/(20000/19683), (81/80)/(1600000/1594323), (32805/32768)*(78732/78125) and the parakleisma times the semicomma. Patent vals which temper it out include those for 7, 58, 65, 72, 130, 137, 202 and 346.