Questions tagged [built-in-symbols]

Questions related to handling built-in symbols and functions, for example why they behave a certain (possibly unexpected) way.

22 questions with no upvoted or accepted answers
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Built-in symbols which are more close to the root/core of Wolfram Language

Seeing the vast scope of science covered by the Wolfram Language (WL) and the large amount of built-in symbols (functions), I am curious to know which built-in symbols are more close to the root of WL,...
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109 views

Not comprehending PowerMod

Bug introduced in 10.3 or earlier and persisting through 11.3.0 or later The bug is not present in 10.0. By definition, PowerMod[a, 1/r, m] finds a modular rth root of a mod m. Here's a pair of ...
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57 views

Why ReadList ignores NullRecords for Number?

When thinking on this recent question the immediately obvious solution which came to my mind was to use ReadList with options ...
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281 views

Organizing Wolfram language symbols with Entity

Here's a word cloud tally of the ~5k System names split at camel humps, with the long tail cropped. What resources are available to organize these terms using the new ...
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144 views

Crossing a symbol like p, similar to HBAR

Is it possible in Mathematica to cross a symbol like p, similar to h-bar, used to denote the Planck constant? Picture in case of font problems: In case of h, we have HBAR, inputted as ESC-hb-ESC ...
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78 views

Use of ContainsAny in EntityClass

The documentation page for EntityClass states that Property values in implicitly defined entity classes may make use of Quantity (and intervals of Quantity) for ...
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48 views

Custom iterable objects

I understand that to create objects with custom behavior with respect to existing code one uses upvalues. However, I'm at loss when it comes to guess what interface is expected from objects fed to ...
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29 views

Pattern matching and NonCommutativeMultiply

I am trying to define some functions using NonCommutativeMultiply and I am experiencing some strange behavior. Consider the following expression ...
2
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71 views

Error Message for GrammarRules and GrammarApply

I have been struggling with the following issue regarding an irregularity when deploying and applying GrammarRules. Specifically, it often takes several failed attempts before the execution is ...
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62 views

Built-in functions for Homotopy group

Does Mathematica have built-in functions for Homotopy group, for example for computing $$\pi_n(S^m)=?$$ or more generally $n$-th homotopy group, $$\pi_n(X)=?$$ for some $X$. (I search, but I could ...
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58 views

How would you rewrite these procedurally coded internal routines in functional form?

I came across the following two internal functions SimplifyDump`AbsToSign and SimplifyDump`SignToAbs that have been written ...
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54 views

Wigner-D in MMA

Can some nice MMA fellow explain to me why buit-in Wigner-D function is defined as $D_{mm'}^{J} = e^{i(\phi m+ \gamma m')} d_{mm'}^{j}(\theta)$ against the convention, used by most people on Earth, ...
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79 views

Controlling precision/accuracy inside built-in commands

Some functions (such as Erf) appear to use NIntegrate internally. In such cases, is there a way to control such options of ...
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51 views

How to run the command 'Distribute' on large product of multivariable polynomials without simplifying it

I am new to Mathematica, so pardon if question is trivial. I am trying to expand (i.e multiply out the factors) an polynomial expression $d$, with many factors, obtained as a result of taking ...
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55 views

How to convert `LogTicks[0, 2][[1, 2]]` to a regular number

I want to convert the $10^i$ tick labels generated by LogTicks of the CustomTicks package to regular numbers. The first tick ...
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279 views

Two issues about Underline(d)

From the Help Browser Style["abcd xyz", FontVariations -> {"Underline" -> True}] abcd xyz The text is NOT Underlined, contrary to the online version Also ...
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57 views

Upgrade a built-in function: Nearest (mimic the behavior of V. 10.1 in previous versions)

For versions prior to 10.1 the following returns a error message timedat = {1.1, 2, 3.3}; equalTime = {1, 2, 3}; Flatten@Nearest[timedat, equalTime] Nearest::...
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32 views

After execution of simple list manipulation every expression turns dark blue and nothing is defined - how to debug

This question is related to this one in the sense that it uses the code from there. What happens is best illustrated in the video here. When I run (* part 1 *) ...
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67 views
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InverseFunction cannot evaluate negative arguments

I have difficulty figuring out where my code fails. I want to obtain $\textbf{ry}$ which is the inverse function of rho (see below). When I input positive values for its argument, there's no problem. ...
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44 views

How can I simplify expressions correctly?

the final output of my code gives this expression which i call ttt: ...
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55 views

built-in functions with one argument

I want to find the (NumericFunction) built-in functions that take exactly one document. ...