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Aug
25
comment Can I memoize retroactively?
...because when you say you want to use memoization only "in a specific file" I would suggest to just use the definition of f2 from your post...
Aug
25
comment Can I memoize retroactively?
I'm still not sure I understand... You are saying you want to switch on memoization on the fly?
Aug
25
comment Logarithm of a matrix in base 2?
Nice! Thanks for the background material!
Aug
25
comment Can I memoize retroactively?
So you are saying just `f[x_] := f[x] = ...' wouldn't work? I'm confused about the meaning of "retroactively" here. Memoization after what? You mean in a running session?
Aug
12
answered Sort a list of derivatives
Jul
28
comment solving non-linear set of equations using NSolve in order to get all roots
Just to clarify: You want to solve for t and phip?
Jul
7
awarded  Nice Answer
Mar
8
comment FindMinimum's WorkingPrecision behaviour
Great. Thanks for the additional info!
Mar
8
accepted FindMinimum's WorkingPrecision behaviour
Mar
2
asked FindMinimum's WorkingPrecision behaviour
Feb
2
awarded  Yearling
Dec
3
comment Is Replace doing double work?
Totally blind guess and probably wrong, but I could imagine this is connected to how Mathematica determines if an expression changed (i.e., when to stop computing)...
Dec
3
comment Is Replace doing double work?
Replace does a depth-first postorder traversal of the expression tree. See this very interesting thread for a discussion of the topic.
Dec
2
awarded  Nice Answer
Nov
20
comment Why does LyapunovSolve solve non-standard form?
I agree that this is a little strange, as with this definition Q will normally not be positive definite. Also, RiccatiSolve solves the form corresponding to what you call "standard form". But why is this important for you?
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Aug
21
comment Integral converging in M9 but not in M10
I can't reproduce your problem with ParallelTable. On the other hand I don't understand the significance of Quit here. In what order should I evaluate which commands? Can you elaborate pls?
Aug
21
comment V10 interface problems
I'm on Linux and I've been experiencing (1) for many versions and still do, so I'm pretty much used to it. I think it's a problem with the graphics toolkit they are using. For me the text field is restored when I click into the general area where it's supposed to be. I can also confirm (3), but again, I've had that problem in earlier versions.
Aug
20
comment Why isn't Lookup treated like other symbols?
You seem to misunderstand what ´TempHead /: Lookup[t1_TempHead, t2_TempHead]´ actually does (which caused some confusion for RunnyKine and m_goldberg, see below): It adds a definition to (the UpValues) of ´TempHead´, not to ´Lookup´. That's why unprotecting ´Lookup´ doesn't help of course.