An insignificant report...
I'm not sure it's correct to call the variable t in the integrand, just like the variable in the boundaries... I know it's understandable, but well, it's quite disturbingQuote:
any other way of doing this by convex function's property?
and i hav a question, is there any property of convexity in R^n ?
f''(x)>=0 gives global definition in R
but this fails in R^n, why???