# All Questions

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### How to read from /dev/random?

I am looking to read a few bytes from /dev/random on OS X and Linux. The simplest approach fails on both operating systems (see below). Why? What is a ...
264 views

### Possible bug in Dynamic

The code below crashes the Mathematica kernel in version 10 (not in V9) every time I run it on Windows and on Mac OS. I've sent it to WRI, but was told that they could not reproduce the crash. Does ...
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### How do I turn my verbal argument into something formal in Real Analysis? [migrated]

So one of the exercises I am doing is to prove (or disprove) that 'Every compact set on a metric space is bounded'. Verbally, I can 'prove' this by simply stating: "If the every compact set on a ...
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### How to transpose x and y axes on a LogPlot?

Consider the following simple LogPlot: LogPlot[Exp[x],{x,0,5}] Is there a nice way to switch the axes of a LogPlot? I'm aware that plotting the inverse ...
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### Extrude 2D cross-section to 3D shape with shrinkfactor

I would like to create a 3D shape from extrusion and scaling of a 2D contour. The 2D contour that I have looks like this: and it consists of a bunch of points (here plotted with ...
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### Security of the Wolfram Programming Cloud? [closed]

We have a number of projects where we a contractually obligated to safeguard client data and intellectual property. Prior to using a tool or technology, we must provide documentation that shows how ...
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### Spike train representation

I have a spike train. The data shows the time at which the neuron fired a spike. I want to plot them like this picture: Here is the data for one spike train which corresponds to the one of the ...
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### How to draw a plane parallel to one of the coordinate planes? [closed]

Sorry for the fact that I ask actually the same question on three different stackexchange sites (stackoverflow, mathematics and now here), but I need to find an answer to my problem as quickly as ...
How I can obtain the $n^{th}$ approximation of the following Operator form integral equation? $F(t)=A(t)+\int_0^tds B(s)F(s)$, where \$A(t)=\bigg{(}\begin{matrix}t&0\\Cos(t)&1 ...