Jed Brown

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bio	website	59A2.org/research
	location	Chicago, IL
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visits	member for	5 months
	seen	15 hours ago
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I am a postdoc in the Mathematics and Computer Science Division at Argonne National Laboratory. I am a developer of the PETSc solvers package. See my research page for details.

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85 Answers

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21	Why is Newton's method not converging?
20	What core skills should every computational scientist have?
17	What are criteria to choose between finite-differences and finite-elements
13	Are there any famous problems/algorithms in scientific computing that cannot be sped up by parallelisation
13	What programming strategies can I take for easily modifying algorithm parameters?

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6,090 Reputation

+65	When is MatGetArray/VecGetArray useful?
+60	How can I precondition a non-linear problem before linearization?
+10	Safe application of iterative methods on diagonally dominant matrices
+10	Can diagonal plus fixed symmetric linear systems be solved in quadratic time after precomputation?

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12 Questions

votes activity newest

15	Why is local conservation important when solving PDEs?
11	Why is Newton's method not converging?
10	How can I estimate the condition number of a large sparse matrix using PETSc?
9	Which methods can ensure that physical quantities remain positive throughout a PDE simulation?
8	What is a scalable preconditioner for high-frequency Helmholtz?

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81 Tags

130 pde × 29	47 finite-element × 8
126 linear-algebra × 25	43 multigrid × 8
84 petsc × 20	42 numerics × 8
50 iterative-method × 10	33 performance × 8
49 parallel-computing × 9	33 implicit-methods × 5

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	Stack Overflow	603 rep	514
	Area 51	351 rep	3
$Mathematics$	Mathematics	138 rep	4
	Super User	101 rep	1

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104 Votes Cast

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100	up		41	question		2		1
4	down		63	answer		2		1

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