- Ld µ (Md/Ld) -2 G Vmax 4 / I(0)
- make a number of “standard” assumptions:
- G ~ constant
- Md/Ld ~ constant, or increases slowly to early type
- I(0) ~ constant (Freeman’s law)
## ® Ld µ Vmax 4 (TF relation)

## In practice, none of the assumptions apply…

## all parameters exhibit mild dependencies on vMAX

## Ld µ Vmax n