# Tagged Questions

Mathematica symbols are the ultimate atoms of symbolic data. Every symbol has a unique name, exists in a certain Mathematica context or namespace, and can have a variety of types of values and attributes.

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### Symbolic Expectation Operator [closed]

Is there anyway to write the symbolic expectations operator $\mathbb{E}$ in mathematica? I tried ExpectationsE, but its not quite. Thanks!
2k views

### Which Mathematica function has the longest name (by character length?)

I came across DamerauLevenshteinDistance[u,v] in the documentation center so that got me thinking: Which documented Mathematica function has the longest name? ...
51 views

### Usage of @ symbol in Mathematica [duplicate]

What is the purpose of @ symbol? Also, I would appreciate if somebody could provide a webpage where such functional special symbols are documented
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### Numeric-type attributes for symbols (analog of NumericFunction)

Is there an attribute for symbols that makes NumericQ give True? For example Pi and ...
61 views

### Equivalent command to the Maple indets command

This carries on the discussion here and here. I had mistaken Variable[] to give you ALL variables in an expression, but apparently, it is not meant for that. ...
71 views

I do believe this sort of similar questions had been asked many times, so I have read a LOT. For example this and this as well as many other related posts. But a glance at what my main question is ...
67 views

### Symbolize Subscript doesn't work

I want Mathematica to interpret subscripted variables as symbols. I found documentation suggesting the Notation package could do this, but if I do: ...
105 views

### Is undocumented \.bd = ½ bad to use?

I want to use \.bd which leads to ½ as part of the name of a symbol in the front end (e.g. ...
52 views

### How to get Symbol[“x”]=3 to work [duplicate]

This is probably a really simple one, but I'm stumped. I want Symbol["x"]=3 to work just like x=3. However I can't figure out ...
286 views

### Is garbage collection broken in version 10.0.0?

Bug introduced in 10.0.0 and fixed in 10.0.1 In version 10.0.0 under Windows I am observing the following behavior: ...
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### Is there any way to get Times displayed as $\cdot, *,$ or $\times$ in output form? [duplicate]

In the output of Mathematica, operators $\cdot$ or * or $\times$ are usally displayed as space; e.g., $x * y$ becomes $x \, y$ in output. Is there any option that can be set to make "space" becomes ...
79 views

### Displaying subscripted symbols with TraditionalForm

I have pasted this code in from Mathematica 10 ...
115 views

### How to convert \[Formal…] symbols to standard ones in an expression?

Mathematica generates an expression sometimes using \[Formal] symbols. This is causing a problem with the TeXForm code generated ...
194 views

### How to create a writable and clearable symbol? [duplicate]

I'm trying to create several symbols and assign values to them. Here's what currently appears to work: Evaluate[Symbol["fdds" <> ToString[10]]] = 1 But ...
76 views

### Symbolic Output after numerical computation

I have a small question about the symbolic output. I started to write a program that generates the coordinates of n-dimensional polytopes by Wythoff construction. For crystallographic groups, all is ...
44 views

### How to joint symbolic expressions together [duplicate]

I want to joint symbolic expressions together to create a another symbolic expressions. one way to do that is as follows: ...
94 views

### Some Characters From Custom Font Do Not Show Up

I'm using version 8.0.4.0 on a Mac, and recently made my own .otf and .ttf fonts at PaintFont.com. The font can be based on pretty much anything, including handwriting, and covers everything from ...
146 views

### What's the difference between variables with and without a subscript?

If I input $x = a + b$, the $x$, $a$ and $b$ are blue. When I hit Shif+Enter, the $x$ turns black, indicating the kernel now knows this variable. But when I input $x_r = a + b$, and hit Shift+Enter, ...
56 views

### Optimizing repeated function calls

Easiest way to keep my library nice, is to naively call some functions many times with same parameters. Doing so prevents from zoo of (library-)global variables and complicated initialisation ...
89 views

### Unevaluated symbols [duplicate]

I often find it useful to define a symbol from strings (often in a loop in which I define other symbols). This I accomplish with Symbol (and often ...
99 views

### Append subscript to variable name [duplicate]

I'm importing equations from Word document and transforming them into input form. But subscripts look ugly. Is is possible to programmatically append subscript to variable name? e.g. ...
207 views

### Replace every Minus to Plus in Expression

Thought this is a rather simple thing, but I was not able to find a solution: I have a polynomial expression like: expr1=a^2-b+c*d expr2=a-b expr3=-a+b-c and ...
56 views

### Why won't Manipulate work with symbols generated by Symbol?

Suppose I am provided with two data lists. (Assume for the moment that they are lists of integers.) I would like a function that generates bar charts that I can manipulate. Here is what I have: ...
92 views

### Auto-complete for user defined functions [duplicate]

If I define a symbol in Mathematica, it doesn't show up in the autocomplete list that works for symbols in System. Test code: ...
143 views

### Stopping a head from evaluating more than once

While attempting to answer my own question, Is there a way to "hold" prefix / infix / postfix notation?, I came across the need to evaluate a recursive function only one level deep. For ...
245 views

### Are greek symbols causing different evaluation?

I've updated today to Mathematica 9.0.1.0 from version 8 and found something that absolutely confuses me. Let us define a piecewise function: ...
41 views

I need to turn my Mathematica output (in string form) to a form that I then need to feed to Maple, and specifically I'd need all multiplications to be marked by * (as opposed to x or, as it happens ...
83 views

### Assigning symbolic operators to built-in functions

Can I do something like this: $$\partial_t = D[f, t]$$ i.e. create a symbol instead of a function so that each time I call it, it executes the operation as defined?
234 views

### Defining my own invisible operator

There are some invisible operators in Mathematica (\[ImplicitPlus],\[InvisibleTimes],...
131 views

### Dynamic generation of Buttons

The Project I am trying to dynamically turn on/off the display of data for a circos-esque plot that I generated. The Code I have data stored in mfData and a ...
128 views

### How to open directly the help/reference window from a notebook

I'm used to do ??symbol when I want the reference for a given symbol, then I click on the >> arrows to open the help window. Would it be possible to ...
252 views

### Running out of variables

I am running symbolic calculations with Mathematica. Simplification of algebraic expressions is an important part of them as very often final results can be simplified considerably. Typically my ...
86 views

### Experiment with TagSetDelayed involving Part

Reading Associating Definitions With Different Symbols, I was intrigued by this: You can think of upvalues as a way to implement certain aspects of object-oriented programming. A symbol like ...
64 views

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### Getting new symbols into Mathematica

What is the easiest way get new symbols into Mathematica 9? For example I want to be able to write the Symbol \mathfrak{A} that you have in Latex. I know that ...
116 views

### How can I type "aprox symbol in Mathematica? [closed]

I want to obtain a value of the Normal Distribution, but I can´t type "approx symbol" before Normal Distribution" to tell Mathematica that x FOLLOWS N[0,1] How can I do it? Probability[z >= 8.49, z ...
280 views

### Whats the best practice of using subscripts in symbols?

I have stumbled over several issues about subscripted symbols recently. I would like that I can enter subscripted variables with my keyboard and that they are treated as symbols. I would also like to ...
168 views

### Symbol with Subscript but no quotes in it!

If I use the following function to define me a fancy subscript: ...
83 views

### How to make a function work on symbols in a specific context

Let us say we have two sets of symbols $(x, y, z)$ with the same names that live in two different contexts: ...
1k views

### Guidelines on giving readable names to variables [closed]

I know that one cannot use underscore to a variable name, like degree_of_The_First_Polynomial. But for a long variable name, it ...
112 views

### Displaying the meaning of an operator using Information

I'm using CircleTimes ($\otimes$) operator defined as a_\[CircleTimes]b_ := KroneckerProduct[a, b] so I can use ...
215 views

### Not FullDefinition for Save. MachineID not Protected?

Is there a way to set what symbols's definitions I do not want to store? Consider the following code: ...
201 views

### Given a Boolean representation of a system, how can the Reliability Function be displayed as symbolic algebra?

Can Mathematica 9 convert a Boolean representation of an RBD to its symbolic algebraic form? If I have a simple series Reliability Block Diagram made up of 2 components, c1 and c2 bexpr1=And[c1,c2] ...
121 views

### Remove Removed From Output

How might I remove Removed[..] symbols from the output of an expression? For example Clear[b]; b := Sin[a + a]; Remove[a]; b ...
275 views

### converting between forms - symbols/subscripts - matrix products

If I have a vector of the form (xp+y, x+yp) do you have a simple way of creating the following matrix and vector from it: {{p, 1}, {1, p}} * {x, y}, such that ...
31 views

### Symbol created in unevaluated second argument of If [duplicate]

Apologies for the long question title, but I couldn't come up with something shorter to describe the following. Starting with a clean session, there are no symbols in, let's say, ...
312 views

### Using Greek letters with subscripts as symbols

I'd like to use Subscript[ϕ, 1] as a function name: Subscript[ϕ, 1][x_] = C1 + C2*x + C3*Exp[α*x] + C4*Exp[-α*x] But as I use ...
141 views

### Is it possible to write a function immune to symbol redefinitions in any Block surrounding its invocation?

Normally, semantics of symbols used in a function definition can be changed by their redefinitions in Blocks surrounding the function invocation: ...