|float[dimensionless scalar variable]
In renormalization theory based upon a non-interacting polymer, appears to approach a value of . For interacting polymers, the matter is not so clear-cut, but one probably should not exceed by much since the exponent has the tendency to "damp out" the correlation. There is little meaning in a correlation of less than exponential square root as might be attributed to a spin-glass system or some forms of neural networks. Therefore, the value for has been set to the limits .