Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-07-03 Thread Launchpad Janitor
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Status: Open => Expired Launchpad Janitor expired the question: This question was expired because it remained in the 'Open' state without activity for the last 15 days. -- You received this question

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-20 Thread Zhicheng Gao
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Zhicheng Gao posted a new comment: Hi, I have searched for the answers about the PeriodicFlowEngine. I concluded that since there is no boundary condition for periodic boundary conditions, the

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-17 Thread Zhicheng Gao
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Zhicheng Gao gave more information on the question: The paper[1] link is https://www.sciencedirect.com/science/article/pii/S0266352X17303087 -- You received this question notification because your team

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-17 Thread Zhicheng Gao
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Status: Answered => Open Zhicheng Gao is still having a problem: Hello, Bruno. Thank you very much for your reply. I'm doing research similar to the paper " A discrete numerical model involving partial

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-16 Thread Bruno Chareyre
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, It can happen that LDL fails for numerical reason, then the solver switches to LDLt, which is more stable. I _could_ be a safe

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-15 Thread Zhicheng Gao
Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Zhicheng Gao posted a new comment: Can anyone provide some help, thank you very much! -- You received this question notification because your team yade-users is an answer contact for Yade.

[Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

2021-06-14 Thread Zhicheng Gao
New question #697526 on Yade: https://answers.launchpad.net/yade/+question/697526 Hello, I reinstalled Yade from the source code,the version is yade-2021-06-08.git-4852d56, and the version of Ubuntu is 18.04. I tried to delete the particles. There is no problem with the FlowEngine, but the