221 reputation
19
bio website
location Cambridge, England
age 25
visits member for 2 years, 8 months
seen Dec 4 at 22:38

PhD student in numerical general relativity with a keen interest in high-performance computing, C++, and anything to do with programming.


Nov
20
awarded  Teacher
Nov
20
revised Non-separable partial differential equation in polar coordinates
added 30 characters in body
Nov
20
answered Non-separable partial differential equation in polar coordinates
Nov
20
comment How to exclude a region from ParametricPlot
Perfect! Thanks and apologies for my oversight in looking through the docs.
Nov
19
awarded  Scholar
Nov
19
awarded  Supporter
Nov
19
accepted How to exclude a region from ParametricPlot
Nov
19
asked How to exclude a region from ParametricPlot
Nov
19
comment Non-separable partial differential equation in polar coordinates
It seems that NDSolve is sometimes a bit picky when it comes to elliptic equations. Just a quick query: are you sure there is actually a bound state solution for these parameters? I've run Eigensystem on the discretised Schrödinger operator and can't seem to find any sensible solution.
Nov
17
comment Symbol definition in parallel kernels
Also, Association is clearly an appropriate solution here which I will indeed use. However, the question still holds: is there a way to define to a symbol in the way described above from parallel kernels?
Nov
17
comment Symbol definition in parallel kernels
This was exactly what I was looking for before going with the "attching to data" route. Honestly, in my years of using mma I've somehow never come across this rather fundamental built-in. I did try searching for "HashMap in Mathematica" or some such earlier but somehow that yielded nothing useful. Thanks a lot!
Nov
17
revised Symbol definition in parallel kernels
edited title
Nov
17
asked Symbol definition in parallel kernels
Nov
11
awarded  Yearling
Sep
24
awarded  Autobiographer
Apr
28
awarded  Commentator
Apr
28
comment Simplifying expression on power
I will add to the above that RuleDelayed can be invoked by replacing -> with :>.
Feb
14
revised Can I tell Simplify to prefer nested polynomials?
deleted 195 characters in body; added 3 characters in body
Feb
14
answered Can I tell Simplify to prefer nested polynomials?
Feb
14
comment Can I tell Simplify to prefer nested polynomials?
Thanks for this, it does seem to be an interesting idea. I should note, however, that my real concern here is not so much performance as floating point precision. If r is orders of magnitude away from 1 then 8 + 13 r^2 + 11 r^4 + 5 r^6 + r^8 is obviously a rather bad thing to be doing.