Re: [petsc-dev] DMPlex "chart" term

2017-10-11 Thread Matthew Knepley
On Wed, Oct 11, 2017 at 10:55 AM, Patrick Sanan wrote: > On Wed, Oct 11, 2017 at 10:58 AM, Matthew Knepley > wrote: > >> On Wed, Oct 11, 2017 at 4:54 AM, Patrick Sanan >> wrote: >> >>> Another terminology question to help with the docs. >>> >>> What's the origin of the term "chart" in DMPlex? I

Re: [petsc-dev] DMPlex "chart" term

2017-10-11 Thread Patrick Sanan
On Wed, Oct 11, 2017 at 10:58 AM, Matthew Knepley wrote: > On Wed, Oct 11, 2017 at 4:54 AM, Patrick Sanan > wrote: > >> Another terminology question to help with the docs. >> >> What's the origin of the term "chart" in DMPlex? I'm only previously >> familiar with the term in the context of manif

Re: [petsc-dev] any way to detect if a matrix is singular?

2017-10-11 Thread Barry Smith
For testing purposes you can use -pc_type none -ksp_monitor_singular_value and see if it looks like the smallest singular value is converging to zero. > On Oct 10, 2017, at 7:20 PM, Kong, Fande wrote: > > Thanks, Hong and Matt, > > I think the matrix is singular. I will be checking the

[petsc-dev] Fwd: [ECP-ST-PIs] Plan for Regular ECP Software Stack Releases - your feedback sought

2017-10-11 Thread Barry Smith
> Begin forwarded message: > > From: "Neely, Rob" > Subject: Re: [ECP-ST-PIs] Plan for Regular ECP Software Stack Releases - your > feedback sought > Date: October 10, 2017 at 9:55:29 PM GMT+2 > To: "ecp-st-...@exascaleproject.org" > Cc: "ecp-lab-leaders...@exascaleproject.og" > , Andrew Sie

Re: [petsc-dev] DMLabel in Fortran

2017-10-11 Thread Matthew Knepley
On Tue, Oct 10, 2017 at 9:07 PM, Adrian Croucher wrote: > hi > > On 03/08/17 13:10, Matthew Knepley wrote: > > On Wed, Aug 2, 2017 at 8:06 PM, Adrian Croucher > wrote: > >> I haven't tried this myself, but two of my colleagues are reporting >> problems accessing DMLabel from Fortran, when using

Re: [petsc-dev] DMPlex "chart" term

2017-10-11 Thread Matthew Knepley
On Wed, Oct 11, 2017 at 4:54 AM, Patrick Sanan wrote: > Another terminology question to help with the docs. > > What's the origin of the term "chart" in DMPlex? I'm only previously > familiar with the term in the context of manifolds (where chart = > homeomorphism from an open set in the manifold

[petsc-dev] DMPlex "chart" term

2017-10-11 Thread Patrick Sanan
Another terminology question to help with the docs. What's the origin of the term "chart" in DMPlex? I'm only previously familiar with the term in the context of manifolds (where chart = homeomorphism from an open set in the manifold to an open set in R^n). In terms of the use in DMPlex, is there