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Member of Wolfram Resarch, Mathematica Algorithms R&D department


Aug
6
comment Dispatch displays rules incorrectly and evaluates when displaying
@JacobAkkerboom This issue is now fixed and should make its way into version 10.0.1.
Aug
5
answered What's the difference between Inactive and HoldForm?
Aug
5
answered Why does TraditionalForm[Inactivate[x y]] show x * y ? instead of x y?
Jul
16
answered Dispatch displays rules incorrectly and evaluates when displaying
Nov
30
awarded  Yearling
Sep
17
awarded  Good Answer
Jan
30
answered install mathematica 9 on linux encounter “Glibc_2.4” not found
Jan
18
answered Manipulate code creates error messages when file is opened
Dec
31
awarded  Nice Answer
Dec
31
awarded  Commentator
Dec
31
comment How to create an executable notebook in Mac OS X
@Jens--to explain further: the Mathematica executable is the FrontEnd executable; it doesn't read from standard input and is not scriptable. You wanted either MathKernel or (better yet) MathematicaScript, as expalined here.
Dec
31
answered What is the difference between Reduce and Solve?
Dec
21
awarded  Nice Answer
Dec
16
comment Possible bug in v9.0 Rest[] function
The function is tried in both cases. The near-but-not-actual sequentiality is relevant but minor factor. The main difference is size of the integers. When solving integer equations involving 10000 numbers, the extra two digits require significantly more time/space, which allow the bug to be triggered.
Dec
15
revised Possible bug in v9.0 Rest[] function
update with new explanation and suggested workaround.
Dec
14
comment Possible bug in v9.0 Rest[] function
One thing to try: disable the Suggestions Bar in Edit > Preferences. Based on your description of the problem, it sounds like the kernel is crashing sometime after the output is generated. It could the some operation in the code to generate suggestions is interrupted at precisely the wrong moment and this causes a crash (of course, that's a bug we need to fix). However, I wouldn't expect such a crash to 100% reproducible.
Dec
14
comment Possible bug in v9.0 Rest[] function
Yes. I made sure to use the honest-to-goodness released version of 9. Other than the set directory, I evaluated all the notebooks in order.
Dec
13
comment Mathematica not simplifying square root expressions even with assumptions
@rcollyer However, assumptions in the second argument and assumptions in an option are different. If the second argument, they override any existing assumptions. As an option, they append to any existing assumptions (from $Assumptions, and external Assuming, etc.).
Dec
13
answered Possible bug in v9.0 Rest[] function
Dec
13
comment Verifying and deriving basic (block) matrix identities
Block matrices are also not supported at this time. As you point out, we will need to add new symbols to support these, because if A,B, C and D are matrices, {{A,B},{C,D}} is a rank-3 array.