x1 is the black-body Stefan-Boltzmann sigmaSB constant [approximately equal to: 5.670373(21)×10(−8) W/(m2×K4)], expressed in units x2 (default: unitless/dimensionless and equal to pi2 / 480) in paradigm/system/metaphysics/universe x3 (default: this, our actual, physical universe)
See also: boltsemaku, nejni, 1/n, "n/" => n/1, or "/" alone => golden ratio.">fi'u, mitre, snidu, kelvo, delno.