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

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2
votes
0answers
208 views

Syntax colouring when using Symbolize

I need to use symbols with suffixes in order to make my code readable in relation to the Eurocodes. To do this I use Symbolize from the ...
3
votes
1answer
2k views

How to define the Einstein summation convention in Mathematica?

How to define a Einstein summation convention in Mathematica? Say, how to let Mathematica know T[i,i] equals ...
4
votes
1answer
139 views

Setting a binary operator Flat

I defined a binary operator in as the first statement in a new Mathematica notebook. {x1_, y1_} ⊕ {x2_, y2_} := Module[{}, Print["do anything"];] where the code ...
1
vote
3answers
1k views

Examples of (well coded) packages using custom notation

Which packages do you know of, that have the following properties: using custom notation (for input AND output would be preferable) well coded & designed (from your subjective perspective!)
4
votes
0answers
183 views

Notation Package Quirk for single Symbols

I encounter the following quirk in the Notation package: consider the following ==> and <== declarations ...
3
votes
0answers
280 views

Best Practice for using Notation, $Pre, MakeExpression in a package [closed]

I'm setting up a package that defines a custom notation. I'd like to inquire about best practices and possible issues of: using the Notation Package using $Pre ...
6
votes
3answers
213 views

Map Input A B C to MyProduct[A,B,C] (NOT to Times[A,B,C])

In writing my own (noncommutative) product I want to avoid typing redundant symbols like A.B.C or A**B**C, I just want to type <...
8
votes
2answers
2k views

How to tell Mathematica that a function is dependent on other variables?

I am trying to derive some turbulence model dependencies and I am using Reynolds averaged Navier-Stokes equations. What I am trying to do is to tell Mathematica that OverBar[u] is dependent on x,y,z ...
5
votes
2answers
158 views

How do I mimic the functionality of “<>”?

The Cell expression for: <> is Cell[BoxData["<>"], "Input"] However similar expressions are parsed into RowBox(...
6
votes
1answer
351 views

$\TeX$ conversion, support for \hphantom

I'm trying to write some $\TeX$ conversion for a tensor with an upper and a lower index, but I would like the lower index to be displaced to the right by the width of the upper index. In (La)TeX I ...
14
votes
2answers
1k views

How can one define an infix operator with an arbitrary unicode character?

You can setup "UsefulFunction[a, b]" to use custom infix notation "a [LeftRightArrow] b" as follows: ...
29
votes
1answer
779 views

Prefix operator with low precedence

The question is simple, but I will elaborate on the background as well for those interested in the idea: How to define a new operator with specified precedence value? Background Mathematica was ...
22
votes
5answers
3k views

Having the derivative be an operator

How do I create an operator which acts like a derivative to everything to the right of it: for example: $ \left( \partial_x + \partial_y + z \right ) x \psi $ How do I make that evaluate to: $x \...
8
votes
2answers
343 views

Custom Format for “constructors”

Say I have a the typical Mathematica linked list structure defined like so: Attributes[Pair] = {HoldAllComplete}; Nil = Pair[]; Cons = Pair[#1, #2]&; It's ...
7
votes
1answer
353 views

Assignment rule to distribute matrix-multiplication over custom notation

I'm trying to write some code to do basic algebraic manipulations in BraKet notation. Thus far I have a function KetToVec which will convert any expression of the form a1 Ket[s1]+ b Ket[s2] +... to a ...
15
votes
2answers
1k views

How to use subscript in pattern names?

For example I want to define a function with parameters σx and σy, that is, the function will be declared as: f[σx_,σy_] := . . ....
32
votes
2answers
10k views

Can we use letter with a subscript as a variable in Mathematica?

I tried Subscript[a, 0] = 1 (* 1 *) Clear[Subscript[a, 0]] ...
7
votes
1answer
259 views

Can the Notation function support complex structures on its left hand side?

In my investigation of the possibilities offered by the Notation package, I came over a limitation in the complexity of the left hand side symbol. For instance, although I am able to enter ...
13
votes
2answers
340 views

Difficulties in creating strict and robust equivalence between two symbols using the Notation package

I am investigating the use of the Notation package facilities to create strict the equivalence between pretty-printed symbols such as ...
10
votes
1answer
504 views

Creating custom notation

How does one generate custom symbols? For example, the physicist notation for the rotation is "nabla cross function". In this case however, Mathematica complains that the ...