A researcher has posted an EXPLICIT RUNGE KUTTA METHOD with a claim that it is of order 8. It appears that it is only of order 4. I would like to help him correct it so more accurate answers are obtained from codes he writes.
I have posted coefficients of explicit Runge--Kutta pairs of orders (p-1)p for p = 5,6,7,8 on my
webpage at www.sfu.ca/~jverner