The Kernel is the back-end application thread that does the actual evaluation of all non-graphical expressions. It can be accessed directly through the console but is more commonly working behind the scenes to power the Notebook Interface. Multiple Kernels may be run for parallel computation.

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Strange evaluation of an sum involving binomial coefficients

I stumbled upon this problem while playing with Mathematica 10. Can anyone help me explain the following behaviour? I define a sum ...
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151 views

In .NET/Link, how do I not open multiple kernels?

I'm writing an ASP.NET page intended for multiple users. On the backend we have datatypes that are primarily mathematical, and interact with Mathematica for string-to-double evaluations, among ...
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Threads vs Cores: How many kernels need to launch in parallel Mathematica?

I have a dual-core intel machine. I would like to test how many parallel local kernels should be launch to get the optimized performance. Knowing that the HyperThreading technology of Intel could run ...
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Why FrontEnd`KernelExecute doesn't work in KeyEventTranslations.tr?

Which commands can you put in KeyEventTranslations.tr ? There is an extensive list of FrontEndTokens, but what else can you use? Why something like this doesn't ...
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How to determine reason for kernel crash? -> Nelder Mead optimisation

I am making use of the Nelder Mead algorithm inside Mathematica's NMaximize to find a parameter set by solving the Schrodinger equation for a given system. (see ...
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Suspend computation so it can be resumed even after the PC is rebooted

Sometimes a computation takes a long time. But when I sleep in the night, I want to shutdown my PC. Next morning when I wake, I want to start Mathematica and resume the computation. If you are ...
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MathKernel with `-noprompt` hangs indefinitely when converting simple TeX expression

If I enter MathKernel -noprompt -run 'ToExpression["1", TeXForm]; Exit[]' the kernel hangs, apparently while running TeX.exe ...
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Why am I getting a kernel crash on Chop?

First post, hopefully I figure out the formatting easily. Please forgive me if this posts ugly. I am having a (repeatable) problem where when I run my code everything works fast and the output is ...
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161 views

Launching Remote Kernels takes a lot of time

I recently played around with establishing a remote kernel setup without using mathematica grid. To do this I use the LaunchKernels[] command and ...
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Behavior of $PreRead in Kernel

I am interested in making a simple accounting style line calculator that allows me to interact with it something like this: ...
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67 views

Integrate with Subscript: does this crash your kernel too?

I encountered some strange behaviour running v10.0.1 on a Mac Pro, while working with Integrate and Subscript. Starting from a ...
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$Epilog does not work when exit

The following code does work: $Epilog := Print@1; Quit[]; But if I close the document and exit WM or click QuitKernel, it does not work. Why?
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Death of parallel sub-kernels

EDIT : Finally, the new Mathematica 10.0 seems to fix it. I have a little parallelization problem. I wrote a code to generate a quasicrystal by dynamical generation. Here the code: ...
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Kernel quits upon evaluation of a limit

Using 9.0.1 on OS 10.9.3, I evaluated Limit[(1 + t/Sqrt[n])^-n, n -> Infinity] at the start of a session and it caused an error that made the kernel quit. ...
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321 views

Remote kernel shuts down after several seconds

I have Mathematica 9 installed on two Windows Server 2008 R2 machines. Now i want to try using one of them as a frontend with local kernels and the other one for remote kernels. OpenSSH 6.5 for ...
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355 views

Runaway MathKernel!

I was running a simulation and everything went south (my fault, stupid coding error). So I quit the kernel. Everything was running very slowly, as if it were doing some kind of large calculation. ...
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Multiple scripts run using same kernel

I have an external program that calls Mathematica scripts upon certain events. Each script requires a large Mathematica library to load (takes a while). Is there some way to run an initial script ...
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606 views

Configuring Remote Kernel via terminal in Linux

There's a server at work, which I would like to use as a remote kernel. I have access to it via terminal (server is running Red Hat, my client Windows 7). I don't know if the kernel is set up or not, ...
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How can I rename the local kernel without causing issues?

I would like to name my kernels. However when I remove "Local" Mathematica becomes unstable, sometimes crashes sometimes doesn't initialize correctly. Is there something special about the name ...
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Is there a way to give Mathematica extra memory?

I am running Mathematica 10 (Student Edition) on Mac OS X 10.7.5 on an old Mac Pro. I have lots of extra RAM that the system isn't touching, and I would like to give some of it to Mathematica in the ...
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Long time quitting kernel

Sometimes, but not always, when I quit the Mathematica 10 kernel using Evaluation / Quit Kernel, it can take several minutes before the process is completed. Other times, for the same program, it only ...
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How to make Show work in Mathematica 10 Kernel

Wolfram Research says it no longer supports JavaGraphics in Mathmatica 10. This is very bad for people who prefer the Kernel to the FrontEnd. However, I am still able to get it to work. Show ...
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How to kill the kernel process from the command line without killing the frontend?

Sometimes the kernel hangs and I'd like to see if I can kill the math-kernel process without destroying my front-end session and losing the changes in my unsaved notebook!
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37 views

Initiating another Kernel?

How can I start a separate kernel to do other work, while I have Mathematica working on a problem that requires lots of computation time? I have a program that must be run for many hours, preventing ...
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kernel stops evaluation, clears variables

I am using the new Mathematica 10 student edition. As I am evaluating a table of integrals and calling NIntegrate repeatedly, the evaluation stops without error and the kernel clears all variables. ...
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Evaluating expressions stored in notebook from Java

The Mathematica kernel can generally open a notebook and evaluate the functions present in the notebook using UsingFrontEnd Command. Example: ...
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131 views

Save open Mathematica Notebook from command line or second Notebook to avoid data loss

I was executing a long Mathematica Notebook over night. The Mathematica instance is running on a Linux workstation (in a vnc server session to be precise). Now I cannot access this session anymore, ...
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63 views

CreateDocument using a specific Evaluator (Kernel)

I was trying to build a button to create a new document that contained a dynamicaly changing table. In the parent notebook i am using another kernel - not the usual "Local". The problem is that in the ...
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230 views

Licence and number of controlling kernels

I'm trying to understand the differences between controlling kernels and subkernels. I created 3 local kernels (kernel configuration options > add), each using a maximum of 8 local subkernels. ...