[Coin-ipopt] 2 questions about hessian info calculations

[saeed serpooshan]

dear andreas
this is list of questions:
 
1- if we don't have hessian info, what is best option to be used by IPOPT? (only one method or severall options?)
 
2- if i calculate hessian with a finite-difference method ( such as df(x)=f(x+h)/h ) , is there any difference between it and what will be done by IPOPT when we run it only by jacobian? 
 
thanks alot
saeed

		
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