PETSc - homogonize qf/op variable names

PETSc - drop unused struct members in sphere example

Style - fix pointer alignment for setupsphere

make style

Homogenize all section headers style to 40 chars

Use consistent section headers style

This is not only for consistency sake, but it also allows for easy visualization of section breaks

Slightly improve doc of bpssphere

Multigrid - create fineLevel = numLevels - 1 variable for readability

doc: expand exposition on coordinate transformations and metric tensors

Simplify explicit pseudoinverse calculation in bpssphere setup.

Multigrid - use one mat shell for prolong/restrict

PETSc - set GET_DIAGONAL for bps

Multigrid - simplify diagonal computation logic

PETSc - simplify calls to gather/scatter

PETSc - convert multigrid example to use GAMG on coarse solve

User manual: Add description of PETSc BPs on the cubed-sphere

doc: split examples into separate files in the source tree

* Copy examples/**.rst into the source directory so they can be picked
up by Sphinx.
* Some minor corrections/clarifications to docs that

doc: split examples into separate files in the source tree

* Copy examples/**.rst into the source directory so they can be picked
up by Sphinx.
* Some minor corrections/clarifications to docs that I noticed while
splitting them apart (shame on me for bundling in this commit).

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PETSc BPs on the cubed-sphere (#463)

* Add setupsphere.c and bpssphere.c and improve doc of area problems

* Improve doc of area.c

* Areasphere: improve doc

* Update Makefile for bpssphere

PETSc BPs on the cubed-sphere (#463)

* Add setupsphere.c and bpssphere.c and improve doc of area problems

* Improve doc of area.c

* Areasphere: improve doc

* Update Makefile for bpssphere

* Use Sqr define in area/areasphere.okl

* BPs on the sphere: Add BP1 and BP2

* Update ./gitignore for bpssphere

* BPs on the sphere: Use MatSetNullSpace for Laplace operator

* BPs on the sphere: Add BP3

* Style fix in navierstokes.c

* ceed/ex2-surface: remove ununsed M_PI_2 define

* BP3: Use different rhs and true_soln functions

* bpssphere: normalize quadrature point coordinates to sphere

* Remove extra DMSetFromOptions() call in SetupDMByDegree function

* Add bp3sphere.okl

* Update bpssphere problems after interface change in PR #447

* Make style

* Update TESTARGS

* Fix make style change

* Slightly increase the tolerance for test_mode

* Update bp2sphere.h and bp2sphere.okl with asymmetric formulation consistent with PR #464

* Add BP4

* Enable BP5/BP6

* Add bp4sphere.okl and style

* Update after Strided Restrictions and latest updates in PETSc

* change booleans to PetscBooleans

Not to be pedantic, but this change was suggested by my IDE ^_^

* examples: s,pysical,physical, and small comment

* Simplify unnecessary bidimensional matrices

Co-authored-by: jeremylt <jeremy.thompson@colorado.edu>
Co-authored-by: Jed Brown <jed@jedbrown.org>

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examples/petsc: update for PETSc master

PETSc recently merged a change that replaced the (incorrectly named)
PetscDTGaussJacobiQuadrature() with PetscDTStroudConicalQuadrature().

https://gitlab.com

examples/petsc: update for PETSc master

PETSc recently merged a change that replaced the (incorrectly named)
PetscDTGaussJacobiQuadrature() with PetscDTStroudConicalQuadrature().

https://gitlab.com/petsc/petsc/-/merge_requests/2574

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ElemRestriction - add CEED_ELEMRESTRICTION_NONE so we can stop making dummy restrictions for CEED_EVAL_WEIGHT fields

Restriction - add CEED_STRIDES_BACKEND

CPU - fix CPU backend stridiniding for CEED_BACKENDSTRIDE

Restriction - add CEED_STRIDES_BACKEND

Restriction - replace identity restrictions with strided restrictions

PETSc - remove some symmetries in the BP test cases

Examples - remove imode variables in PETSc examples