# All Questions

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### Generating a list of overlapping end coordinates [duplicate]

I'm a very new user to mathematica so this may be a silly question. i'm trying to evaluate some integral between end coordinates of some evenly spaced range. my range is defined by the number of ...
67 views

### How to contourplot a function defined via findroot? [duplicate]

when I use contourplot, the system will simplify the expression first with its parameters holded. However some expressions can not be simplified first without inputting parameters, for example, ...
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### How to rewrite and possibly speed up a recursive sum?

I have the following for-loop calculating a multiple nested sum ...
120 views

### Solving Non-linear System of Equations

I need to get a symbolic solution to a system of non-linear equations (equation 8 is non-linear), but Mathematica is running for ever and gives no answer. Is there another way to get the solution? My ...
94 views

### How to reduce a quartic form to a quadratic form with equal roots

Preface: To clear the theoretical background this question is cross-posted on math.stackexchange here. I have a polynomial in $n$ variables of the form ...
160 views

### Compile a MeijerG function [duplicate]

I am not very experienced with Compile, I tried to use it for a Meijer-G function ...
104 views

### How do I efficiently navigate the Documentation Center?

Back in the day, I read the Mathematica Book cover-to-cover, and I found it to be an enlightening experience. I realize that the Documentation Center is now an order of magnitude larger than the ...
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### Writing a Code to plot a function that includes a double integral [closed]

I am trying to write a code in Mathematica. Here are my steps: F[u_] = Some nontrivial and long expression in terms of u; Umax[x_, y_] = Some expression in terms of x and y; W[x_, y_] := integral ...
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### Problem using variable loaded from TextField

I'm trying to make a simple app, which loads some data via TextFields and then does something with that, but ... ...
64 views

### Dot in place of prime to denote differentiation

To denote differentiation with respect to time I wish to use overhead dots rather than primes, so that differential expressions will look somewhat like this: $\quad \quad$ ...
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### Updating a GUI with ComboBox using GUIKit

Dear Mathematica users, does anyone know how I can update my existing Gui window (made with GUIKit) by choosing different values of a ComboBox so that different and multiple TextFields etc appear ...
49 views

### Using an external Pattern breaks Format

I noted while writing this answer that using an external Pattern on Format doesn't work: ...
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### Partition a range of integers into triples

Some time ago, I was asked to look at a simple to formulate puzzle. Consider the list of numbers {1,2, ..., 33}. Try to split this list in 11 triples, such that in ...
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### Evaluate the Limit [migrated]

Evaluate the Limit: lim [(1 + 3x) / (1 + 4x^2 + 3x^4)]^3 x->1, as x approaches 1 The answer is supposed to be 1/8 but i keep getting 7/23. what did i do wrong? My work is shown below. Step 1) ...
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### Why is PolyLog[] giving weird answers for ordinary values?

Possibly related to this question, but it seems slightly different: Strange behaviour of PolyLog Function Wikipedia says that for real s, z<1 should be real. So I was confused when MMa returned: ...
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### Runge-Kutta Butcher tables

I like to have the Butcher's table for Explicit (or implicit as well) Runge-Kutta method of a fixed order. I do not understand reading ...
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### How can I plot a 3D graph that shows how a histogram varies with a particular parameter?

How can I plot a 3D graph that shows how a histogram varies with a particular parameter? A simple example of this would be plotting a histogram of data described by a gaussian. The gaussian is of ...
120 views

### TeXForm and Symbolize

I would like to use TeXForm to generate latex output as usual. Howeve, I use subscripted variables such as c_t. Unfortunately, when using symbolize in the notations package for this end, TeXForm does ...
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### Why is default option not being applied? [closed]

I developed a function that converts a magnitude and angle to the corresponding cartesian coordinates. As a convenience, I want the function to assume the angle I provide is in degrees by default, so ...
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I would like to apply a coordinate transformation, visualised as an action on a two-dimensional grid like The particular example above is $$x^\mu \mapsto \frac{x^\mu - b^\mu x^2}{1-b\cdot x+ b^2 ... 2answers 357 views ### Force a negative square root to be interpreted as an I I have expressions like$$\sqrt{-\sqrt{1+x^2}} $$how can I force mathematica to systematically rewrite this as$$i(1+x^2)^{1/4} \quad ? 

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