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dimensionality | shorthand | comments | zeroD : | [d,t]^0 | "prime dimensionless ratios" (Poirier) two fundamental laws cannot share the same PMDs | square root : | [d,t]^0.5 | intra-Birkeland current, radial to axis of current (Donald Scott) | linear : | [d,t]^1 | string (Fourier series) | planar : | [d,t]^2 | drum (Bessel functions) | spherical : | [d,t]^3 | sphere (?spherical functions?) |
"... History never repeats itself, but it rhymes. ..."
"... History never repeats itself, but it rhymes. ..."(?Benjamin Disraeli, not Mark Twain?)