# Questions tagged [precedence]

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### Forcing Explicit Parentheses in Traditional Form

I have an expression in input form for the Cosine of a dihedral angle: ...
• 1,883
40 views

### What's the effect of SyntaxForm option in StandardForm boxes of Superscript?

Consider the following sample: ...
• 66.7k
1 vote
46 views

### Finding a list of results of an arithmetic operation with a permutations of precendence

Consider 3* 2 + 2 /4*10 With the default precedence for *,+, and / the result is 11. I am curious what the results would be for all six choices for the precedence ...
• 4,510
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### Simplify Map on a list of lists

I have the following example list of matrices: a = {p Table[RandomComplex[], {2}, {2}], q Table[RandomComplex[], {2}, {2}]} where p and q are real variables. I ...
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68 views

### Precedence of @@ vs /@ [closed]

How do I find what I think is called the "precedence" of a given operator. That is, for the following code: ...
• 101
264 views

### i_:0|1 varies in v12.1: incompatible change or bug?

Just check i_: 0 | 1 // FullForm In v12.0 or earlier the output is Alternatives[Optional[Pattern[i, Blank[]], 0], 1] But in ...
• 66.7k
115 views

### Why Divide does not give the same answer? [closed]

I saw a question on Facebook $8\div2 (2 + 2)=?$ Consider these inputs. Divide[8, 2 (2 + 2)] 1 $8\div2 (2 + 2)$ using esc+div+esc 16 Why the results are ...
• 10.8k
111 views

### Operator Precedence in Notation Package

I am trying to use the Notation package to define custom notation for chemical reactions. The natural thing to do is to use a \[LongRightArrow] for the operator....
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444 views

### Table of precedence values for all System symbols

Has anyone created a table listing the precedences for all symbols? Also, it would be nice if there were a function that for a given precedence value or interval, returned all the symbols with that ...
• 131k
758 views

### How exactly does Postfix notation work?

I guess I've been using the Postfix notation // wrongly for some time now. I assumed it was a quick way to apply a function to ...
• 4,491
672 views

### Change Operator Precedence of --> operator

I am trying to use --> operator with highest precedence ...
• 961
514 views

### Which operators are missing from the official precedence table?

I often use the Operator Input Forms page as a reference for operator precedence as well as which (used or unused) operators exist. However, I just noticed that at least one operator is missing from ...
• 8,774
888 views

### Is it important that the front-end has a built-in parser?

The Notebook interface has a parser that seems aware of all operator-precedences, allowing us to step through the expressions (rather: Box-) hierarchy with Ctrl+. This is extremely convenient, saving ...
• 5,739
143 views

### PrecedenceForm with Format

I'd like to format the output of certain operators with Infix-style formatting to have lower precedence than Times. Let's say I ...
• 3,473
744 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 ...
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254 views

### Bug in grouping after editing code?

Bug introduced in 7.0 or earlier and persisting through 11.0 While looking at A question about conditional replacement I think I discovered a bug in the Front End that affects both 7.0.1 and 10.0.1 ...
• 272k
384 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] ...
• 781
1 vote
103 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 ...
• 43
367 views

### Why Min cannot be used as constrains of NMinimize?

I met a strange problem when trying to do an optimization. Initialization code, ...
• 1,429
6k views

### when is f@g not the same as f[g]?

I have always thought that f@g will give the same result as f[g] in all cases, and it is just a matter of style which one to use ...
• 145k
1k 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 ...
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