From a HyperSizer User (Version 5.8.11):
In the correction factor equation for quadratic ply and temp, there are two terms "G" and "H". Both of them corresponds to linear term of (T-T0). Is it correct ? I think the term corresponding to H should be (T-T0)^2.
You are correct, that is a typo on the form... the correct equation should be:
This will be corrected in the next software update. The software does calculate the correction factor correctly. The mistake is only in the equation text shown on the form.