# Tagged Questions

This is for questions about creating and using custom notations. For help on the use of the built-in operators, see syntax.

192 views

### How to use in for MemberQ

I'd like to use for MemberQ, but I don't want to break anything! The usage would be like this: ...
60 views

### Custom units Compatible with Conversions [closed]

I am writing a Mathematica Palette to work with units, and am wondering if anyone knows a way to define new units outside of the standard ones that come with Mathematica 9. I do know of the ...
98 views

### How to implement Feynman function notation?

I would like trig functions to format with custom DisplayForms as follows: These were created by Richard Feynman in high school. Related: http://tex.stackexchange.com/questions/274463/feynman-...
57 views

### How is MakeExpression processed by Mathematica?

According to the documentation on MakeExpression, MakeExpression[boxes, form] is the low-level function used in Wolfram System sessions to construct expressions ...
606 views

### Can symbols like + or * be used to denote the Plus and Times functions?

Can one do something similar to +[1, 2]? The point is that with one symbol you would be able to write expressions like ...
241 views

### One line definition of a symbol with plus-minus

I'm pretty new to Mathematica. I was wondering is there any way to define the symbol $H_\pm(x,y) = f(x) \pm g(y)$ in one line, so that $H_-$ or $H_+$ can be called separately? Something like: ...
507 views

### Defining indefinitely many functions

Is it possible to define a class of indefinitely many functions f1, f2, f3, ... such that <...
130 views

### Special notation using round brackets and avoiding commas (for $\LaTeX$ input)?

Internally, when I work with mathematica I use a notation like br[1,2,3,4] to denote some quantities. Then I would like to export the results in ...
180 views

### How can I make angle brackets function like lists?

Is there a way to make <a,b,c> behave like {a,b,c}, but remain displayed as ...
51 views

### Changing the grouping of an user defined infix operator

How can I change the default grouping on an operator without a built-in meaning? I've created my own infix operator by defining LeftArrow. ...
387 views

### How to use Feynman Slash notation?

How can I use Feynman slash notation, e.g., $\require{cancel} \cancel{A}$, in Mathematica? I've seen some answer from 2008 which doesn't seem to work well in Mathematica 10. I'd like this to be part ...
87 views

### How to define a number of infix operators with predefined relative precedences

Reading a number of questions about infix operator notations I want to ask if somebody could reimplement the problem below in a simpler way, say modifying ...
352 views

### Redefining a built-in operator

Is there a way I can redefine the || operator such that a||b will be 1/(1/a + 1/b)? Is it ...
252 views

### How to imitate list comprehensions for constant arrays?

In Python, ['a'] * 10 generates ['a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a'] and ...
72 views

### Using subscripted symbols in functions

Using subscripts would significantly improve the structure of my code. Until now I used the following two lines to implement this. ...
231 views

### Listing elements starting from 0

The first element in a list v in Mathematica is denoted by v[[1]] and subsequent ones are then ...
46 views

### Parse notation recursively

For a special notation I would like to get the help of Mathematica to expand complex expressions through a set of Notation rules. However since this tasks involves applying the notation recursively ...
98 views

### Can I redefine the ++ increment operator to make it behave like Haskell

In Haskell, joining two lists l1 and l2 is simply done with l1 ++ l2 In Mathematica (...
150 views

### Symbol with left and right subscript and right superscript

I am trying to come up with a variable that has a left and right subscript and right superscript. I have tried the following ...
85 views

### Define action of noncommutative product of operators

I have objects wrapped with head fv. So they are things like fv[{1, 2}, {3, 4}, {5, 6}] I then defined two operators, a and <...
233 views

### How to construct custom operators with precedence?

I need to combine data structures in operations analogous to addition, subtraction, multiplication and division (and more). I need more than one operation of each type, i.e. more than one method of ...
154 views

### Best choice for an infix join operator?

I would love some advice for what symbol to use and best implement it? ...
330 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: $\quad \quad$ ...
90 views

### Series with specific notation

I'm trying to get mathematicas series function to output a result that look like this: instead of calculating the actual "values", like doing so here: ...
211 views

### How to re-parse (or re-map) character '.' to user-defined function

The default behavior of the character . between two non-numeric characters is to be interpreted as the infix of the Mathematica function ...
3k views

### How to implement Donald Knuth's up-arrow notation

How does one enter very large numbers in up-arrow notation? Up-arrow notation was created by Donald Knuth to write very large numbers in it iterated exponentiation form, for example 6↑↑3 = 6^6^6.
214 views

### Custom operators; custom pattern matching with pure functions

What I'm trying to achieve in Mathematica is the creation of a binary operator whose operands are both pure functions over the natural numbers. The result of the operator should be another pure ...
387 views

### Kronecker delta notation

Is there an easier way to enter KroneckerDelta[n,m] in Mathematica? When I use the notation $\delta_{n,m}$, it won't work.
157 views

### Defining conditional Notation rules

I am trying to define a notation rule so that for selected symbols subsripts will be equivalent to function parameters. My understanding of the docs suggests the following ...
170 views

### Correct way to use Notation

I have tried to create some Notation declarations as follows ...
78 views

### Notation, Format and Interpretation

I am unclear on the exact relationship between Notation, Format and Interpretation. ...
300 views

### Notation package: parenthesis placement for SuperscriptBox

The question concerns the Notation package. I want to define notation for the function very similar to the built-in Power[a,b] ...
225 views

### Is there a way to “hold” prefix / infix / postfix notation?

Is it possible to preserve a specific style of notation in $Mathematica$ output? foo // bar (* bar[foo] *) Hold[foo // bar] (* bar[foo] *) I'm writing some code ...
116 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?
39 views

### custom precedence for custom infix operator with InfixNotation [duplicate]

I am trying to define several custom operators with custom precedence to implement geometric algebra. Loading the notation package << Notation I can ...
391 views

### using index notation for finite differences

I am interested in deriving finite difference equations, which means I have to play around with indexed quantities. For example, for a 2D function f(x,y), I could discretize it on a grid with grid ...
242 views

### Why is D[a[b][c],a[b]] equal to 1[c]`?

Background: I had the same issue as described here, and I went to extend Mr.Wizard’s code such that a[b][c] would be shown as $a_b^c$. Issue: To my surprise, ...
211 views

### Notation for implicit derivative

Consider the following line of code: D[x == y^3 + x y, x, NonConstants -> y] The output would be: ...
217 views

### Custom display format for custom operator

I've tried searching here and in the WRI documentation, but I haven't found what I'm looking for in either place. I'm defining a dx operator to act as a ...
59 views

### Can I define a “postfix map” operator with comparable precedence behavior to // [duplicate]

I am trying to define a "postfix map" operator (denoted $OP$ for now) that behaves thus: ...
1k views

### How is + as an infix operator associated with Plus?

How is + associated with Plus? Suppose I want to define a head FooBar and have it ...
206 views

### New integration symbol

Is there a way to introduce a new integration symbol? Specifically I want to be able to use ⨍. I have no problem entering it into mm, but the size does not change like the standard \int does.
1k views

### Using subscript in a string

I am trying to create a string of the form $0 < d_1 < d_2 < \ldots < d_n$ For a given n. My closest attempt so far is ...
1k views

### Going full functional (Haskell style)

I'm trying to define some notation so that Mathematica code would be more functional, similar to Haskell (just for fun): currying, lambdas, infix operator to function conversion, etc.. And I have some ...
111 views

### Notation not recursive enough?

My notation is not recursing enough. For example, Notation[W[a_ | b_] ⟹ foo[a_, b_]/foo[b_]] Notation[W[a__, b_ | c_] ⟹ W[a__ | c_]W[b_ | c_]] Then ...
107 views

### Vertical “fractions” with more than 2 parts

Standard FractionBox syntax allows only 2 arguments and creates 2-part fraction for numerator and denominator. Is it possible to draw similar construction, but ...
648 views

### Simplistic Notation example

Notation package looks poorly documented. For example, GridBoxDividers option is not documented at all. Can someone give me a simplistic example of a Notation set ...
241 views

### How to enter arrows in Notation function?

It is not clear, what symbol is used in Notation function description for arrows? How to enter it in textual mode within Workbench? Here: http://reference.wolfram.com/mathematica/Notation/ref/...