Re: [deal.II] second derivatives of solution

2017-02-12 Thread hanks0227
OK Thank you very much! Kyusik. 2017년 2월 13일 월요일 오후 1시 3분 27초 UTC+9, Wolfgang Bangerth 님의 말: > > On 02/12/2017 06:15 PM, hank...@gmail.com wrote: > > > > Do you mean that it is right way to get second derivatives but it could > not be > > continuous? > > Yes, you are using the correct way

Re: [deal.II] second derivatives of solution

2017-02-12 Thread Wolfgang Bangerth
On 02/12/2017 06:15 PM, hanks0...@gmail.com wrote: Do you mean that it is right way to get second derivatives but it could not be continuous? Yes, you are using the correct way of computing something that is of questionable usefulness. As I mentioned, this is because for finite elements, the

Re: [deal.II] second derivatives of solution

2017-02-12 Thread Wolfgang Bangerth
On 02/12/2017 04:50 AM, hanks0...@gmail.com wrote: It seems that my question is very easy one, but I can't find the similar thing... I know how I can use solution and first derivative solution that comes from fe_values.get_function_values and fe_values.get_function_gradients So I thought that

[deal.II] second derivatives of solution

2017-02-12 Thread hanks0227
Hi all, It seems that my question is very easy one, but I can't find the similar thing... I know how I can use solution and first derivative solution that comes from fe_values.get_function_values and fe_values.get_function_gradients So I thought that second derivative can be obtained by