User Wolfgang Bangerth - Computational Science Stack Exchange

Wolfgang Bangerth

Member for 11 years, 9 months
Last seen this week

GitHub
math.colostate.edu/~bangerth
Fort Collins, CO, United States

1,182 Answers

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58 votes

Accepted

Is it a good idea to use vector<vector<double>> to form a matrix class for high performance scientific computing code?

answered Aug 29, 2012 at 11:06

32 votes

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Why would you need frameworks like MPI when you can multi-task using threads?

answered Apr 22, 2020 at 14:10

28 votes

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How do compression algorithms compress data so fast?

answered Aug 15, 2022 at 15:03

26 votes

Accepted

Why is the time dimension special?

answered Jul 9, 2012 at 16:22

24 votes

Meaning of "-0.0" in Python?

answered Aug 2, 2021 at 19:43

23 votes

C++ vs Fortran for HPC

answered Dec 16, 2011 at 4:06

21 votes

Accepted

Pressure as a Lagrange Multiplier

answered May 31, 2013 at 5:09

20 votes

Accepted

uniform vs. non-uniform grid

answered Jan 2, 2013 at 22:58

20 votes

Accepted

Why isn't my Matrix-Vector Multiplication Scaling?

answered Mar 22, 2012 at 21:52

19 votes

Accepted

Mathematically, why does mass matrix / load vector lumping work?

answered Jun 5, 2019 at 0:12

19 votes

Recommendations for a usable, fast C++ matrix library?

answered Dec 21, 2011 at 20:02

19 votes

What features do users need from an MPI C++ interface?

answered Jul 16, 2013 at 14:11

18 votes

Binary vs. ASCII file size

answered Sep 4, 2013 at 2:28

18 votes

Accepted

Type of Navier-Stokes equation

answered Jun 5, 2014 at 4:08

18 votes

Why is my iterative linear solver not converging?

answered Dec 23, 2011 at 18:11

18 votes

Accepted

Why is it difficult to numerically solve multi-electron time-dependent Schrödinger's equation

answered May 20, 2013 at 18:36

17 votes

Higher precision floating-point arithmetic in numerical PDE

answered Aug 23, 2012 at 21:18

16 votes

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Can compressible flow solvers be used to solve incompressible flow?

answered Feb 9, 2016 at 19:19

16 votes

What guidelines should I use when searching for good preconditioning methods for a specific problem?

answered Apr 10, 2012 at 6:55

15 votes

Accepted

Is the exponential function, e^x, very expensive to compute in Matlab and harmful to my computer?

answered Nov 1, 2017 at 3:31

15 votes

Accepted

To what extent is generic and meta-programming using C++ templates useful in computational science?

answered Mar 24, 2012 at 20:21

15 votes

What are good ways to document scientific software?

answered Dec 16, 2011 at 4:21

15 votes

Accepted

What is the best way to determine the number of non zeros in sparse matrix multiplication?

answered Jul 17, 2012 at 20:09

14 votes

Accepted

Understanding the Wolfe Conditions for an Inexact line search

answered Sep 13, 2012 at 0:28

14 votes

How do I write dimensionally agnostic code?

answered Mar 26, 2012 at 21:36

14 votes

Is it worthwhile to write unit tests for scientific research codes?

answered Mar 28, 2012 at 21:31

14 votes

Accepted

Optimize an unknown function which can be evaluated only?

answered Apr 8, 2013 at 2:03

14 votes

Does Computational Science involve programming?

answered Nov 16, 2012 at 3:37

14 votes

20% performance penalty for a nice software design

answered Jun 11, 2014 at 7:11

14 votes

Fast explicit solution for $\mathbf{A}\mathbf{x} = \mathbf{b}$, $ \mathbf{b} \in \mathbf{R}^3$, low condition number

answered Oct 10, 2014 at 2:20

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