# All Questions

51 views

### Computing integral involving derivatives

I want to evaluate an expression $\int_C g(\nabla f)ds$. This is an integration along a curve $C$ in a plane given as a function of some parameter $s$: ...
181 views

### Nested If statement with unevaluated arguments

I have a list of boolean functions {f1, f2, f3, ...} that take a value and return True or ...
88 views

### Improving semantic interpretation of dates

SemanticInterpretation and Interpreter are promising but imperfect, eg extracting dates and calendar expressions from ...
289 views

### Minimalistic code challenge on Apollonian gaskets

I've been recently fascinated by the beauty, symmetry and mathematical richness of the Apollonian gaskets. So I felt myself challenged to see if it was possible to generate one in Mathematica with ...
471 views

### Step-by-step instruction to Install C Compiler

I remember using C compiler on my previous computers, and I never had any problems installing them. At this time, however, I failed to work through the instructions provided in Mathematica ...
63 views

### Transforming functions

I am not familiar with Mathematica but have the following question: I am trying to write Mathematica code that transforms $x^a+y^a$ to $(x+y)^a$ for any $x$ and $y$ and integer $a$. I also need to ...
78 views

### How to show all terms of a (very) large expression which was cut by skeleton << >>?

I obtained a very large expression but I noticed that Mathematica omitted some terms and wrote <<1>> or <<8>> instead. I would like to see all terms in order to write rules that simplify ...
111 views

### cross point of intersecting lines [duplicate]

What is the easiest way to find the crossing point of two intersecting lines passing lets say through points line1 = {p1,p2}, line2 = {p3,p4}?
87 views

### DSolve response with DSolve

I'm trying this code ...
91 views

### Looping within linear programming

I am trying to do some network programming around optimization. Here is a reduced sample: ...
70 views

### How to stop a Dynamic[] in one notebook from hurting performance in another?

I have two notebooks open, one has a dynamic expression running (a simple clock) ...
193 views

This code: ...
83 views

### imaginary part in optimization problems

I have some trouble with an optimization problem. The constraints are always real, but in the first place there are also complex parts in the expression (which all sum up to 0). The problem now is ...
260 views

### mathematica use too much memory to Import large dat file

Err... When I try to Import a .dat file by dat = Import["D:\\TIEGCM\\solar_input\\omni_m_all_years.dat", "Table"]; or ...
436 views

### How to simplify and shorten pattern code?

I this code to sorting only those tuples that are have total sum of 15 without repetition.: ...
71 views

### Can't obtain a closed form expression for an integral

I am trying to find the result of quite a complicated double integral. While the first part (being a Principal value integral) gave no particular problems, the second one is not providing any closed ...
130 views

### Using WhenEvent

I want to solve this simple equation with a event: ...
143 views

### Memory leak in MemberQ

Bug introduced in 10.0.0 and fixed in 10.0.2 Consider the following code. ...
65 views

### What's the meaning of <<19>> in the result [duplicate]

Try the following: ...
69 views

### short cut entry in KeyEventTranslations.tr works on V 10.0.2 but does not work in V 10.1

I added 2 useful key shortcuts to my V 10.0.2 KeyEventTranslations.tr to allow adding [[ and ...
61 views

### Different results from Simplify and Reduce given inequality (x/y^2 != 0 && x != 0)

In: Simplify[x/y^2 != 0 && x != 0] Out: x != 0 && y != 0 However, if we use ...
130 views

### Separate output screen; clearing (cleaning) output screen

Is there a way to split the screen so that the code is visible on top, and the output generated from its execution appears at the bottom? Is there any way to clear the screen from previous runs, so ...
48 views

### Strange output of ColorFunction

In v10.0.2, compare the following two outputs: Plot3D[x^2 + y^2, {x, -2, 2}, {y, -2, 2}, ColorFunction -> (Hue[Sqrt[#1^2 + #2^2]] &)] ...
122 views

### Solving ODES in order to find unknown constants

I am trying to solve a set of ODES which represent a second order consecutive chemical reaction. ...
105 views

108 views

### Find list item before first negative value [closed]

If I have a list like this: ...
73 views