Re: [Dmug] knot theory package

[Udo und Susanne Krause via demug <demug@XXXXXXX.ch>]

Hello again,

if loading the precomputed data as described into the KnotTheory  
directory, the second example from the manual fails already

In[7]:= Length /@ {AllKnots[{0, 16}], AllLinks[{2, 12}]}
Out[7]= {1701936, 5700}

In[8]:= Show[DrawPD[Knot[13, NonAlternating, 5016], {Gap -> 0.025}]]
During evaluation of In[8]:= KnotTheory::loading: Loading precomputed data  
in KnotTheory/13N.dts.
During evaluation of In[8]:= Import::nffil: File not found during Import.  
> >

this is because of the picture in the attachment; put the contents of the  
deeper KnotTheory directory to the upper KnotTheory directory and draw


In[9]:= Show[DrawPD[Knot[13, NonAlternating, 5016], {Gap -> 0.025}]]

During evaluation of In[9]:= KnotTheory::loading: Loading precomputed data  
in KnotTheory/13N.dts.

During evaluation of In[9]:= KnotTheory::credits: The GaussCode to PD  
conversion was written by Siddarth Sankaran at the University of Toronto  
in the summer of 2005.

<snip>

Regards
Udo.



On Sun, 22 Jul 2018 18:23:21 +0200, Udo und Susanne Krause via demug  
<demug@XXXXXXX.ch> wrote:

> Hello Stephan,
>
> this still loads into Mathematica
>
> In[6]:= SetDirectory[FileNameJoin[{NotebookDirectory[], "test",  
> "others"}]]
> Out[6]= "N:\\Udo\\Abt_N\\test\\others"
>
> In[7]:= << KnotTheory`
> During evaluation of In[7]:= Loading KnotTheory` version of September 6,  
> 2014, 13:37:37.2841.
> Read more at http://katlas.org/wiki/KnotTheory.
>
> In[8]:= $Version
> Out[8]= "10.4.1 for Microsoft Windows (64-bit) (April 11, 2016)"
>
> I read a bit around on http://katlas.org/wiki/Setup and it says
>
> -----------------------------------------------------------------------
> Notes
>
> Precomputed Data
>
> KnotTheory` comes with a certain amount of precomputed data which is  
> loaded "on demand" just when it is needed. When a precomputed data file  
> is read by KnotTheory`, a notification message is displayed. To prevent  
> these messages from appearing execute the command  
> Off[KnotTheory::loading].
>
> Further Data Files
>
> To access the Hoste-Thistlethwaite enumeration of knots with 12 to 16  
> crossings (see Naming and Enumeration), also download either the file  
> DTCodes4Knots12To16.tar.gz or the file DTCodes4Knots12To16.zip (about  
> 9MB each), and unpack either one into the directory KnotTheory/.
> -----------------------------------------------------------------------
>
> seemingly there are data collections with 12 to 16 crossing given. Have  
> you inspected them,
> where did you run into problems, what did you try already?
>
>
> Have you seen
>
> http://reference.wolfram.com/language/ref/KnotData.html
> http://reference.wolfram.com/language/note/KnotDataSourceInformation.html
> http://reference.wolfram.com/language/ref/interpreter/ComputedKnot.html
>
> before running up a steep learning curve for love it would be good to  
> have a specific point to start with.
>
> Best regards
> Udo.
>
> On Mon, 16 Jul 2018 13:21:33 +0200, Stephan Rosebrock via demug  
> <demug@XXXXXXX.ch> wrote:
>
> > Dear All,
> >
> > How can I write a Mathematica file which uses the Mathematica package  
> > "knottheory" and creates a list of many (as many as possible) different  
> > non-alternating knots and links (rather minimal knot- and  
> > linkprojections) with at least 12 crossings (better: 16 or 18 crossings  
> > or even more) which satisfy: Each component of a link has as many  
> > positive crossings as negative crossings.
> >
> > Best regards,
> > Stephan Rosebrock
> >   *********************************************************
> > Dr. Stephan Rosebrock
> >
> > Paedagogische Hochschule Karlsruhe
> > Bismarckstr. 10
> > 76133 Karlsruhe
> > Deutschland / Germany
> >
> > e-mail:    rosebrock@XXXXXXX.de
> > Homepage:  http://www.rosebrock.ph-karlsruhe.de/
> > Tel:  0721-925-4275
> > Fax:  0721-925-4249
> > *********************************************************
> > _______________________________________________
> > DMUG Deutschsprachiges Mathematica-Forum demug@XXXXXXX.ch
> > http://www.mathematica.ch/mailman/listinfo/demug
> > Archiv: http://www.mathematica.ch/archiv.html
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knotTheoryPreCompLoad.PNG
Description: PNG image

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