The problem of sequences of I Cing hexagrams in binary wheels, disks or necklaces was already viewed in the forun:

64 black+white beads contain all 64 hexagrams:
http://www.onlineclarity.co.uk/friends/showthread.php?t=5053&page=2

I ching on a string:
http://www.onlineclarity.co.uk/friends/showthread.php?t=5613&page=3

*NEW* 64bit Arrangement
http://www.onlineclarity.co.uk/friends/showthread.php?t=5212

Of course, the arrangement is not new in the sense that there were already objects and descriptions following the same idea.

The author of the last thread has developped extensively his arrangement in Abrahadabra Forum:

http://forums.abrahadabra.com/showthread.php?3277-64-bit-I-Ching-Binary-Loop-Wheel&p=40072#post40072

http://forums.abrahadabra.com/showthread.php?3277-64-bit-I-Ching-Binary-Loop-Wheel/page2&

He built the sequence begining with six yin-0 [000000] and adding sistematically yang-1 each time possible, only adds a yin-0 if otherwise will obtain a repeated hexagram.

Working with this method he obtains a unique solution, although wondering...

I'm not sure myself how many unique solutions exist.
Unique being not reflected or inversed.

I can't think of another way to generate it myself, just the self referencing method I used.

Seems the Chinese did know about this arrangement:
http://www.onlineclarity.co.uk/frien...ead.php?t=5053

That is the only place I've ever seen it mentioned.
...

I Ching Code Wheel

From;: http://forums.abrahadabra.com/showthread.php?3277-64-bit-I-Ching-Binary-Loop-Wheel/page2

Click to expand...

In fact this is one method for building a sequence of bits (yi/yang lines) that generates a wheel with the 64 hexagrams, reading six consecutive bits.

Another method would be to choose the opposite to the last bit whenever possible, say yin after yang and yang after yin. It will result another sequence.

There are many possible sequences, as you can see in the following quotes...

Memory wheels or de Bruijn sequences:

The problem of constructing memory wheels is known as the rotating drum problem. The circular binary are often called lenght shift register sequences or de Bruijn sequences after the Dutch mathematician N.G. de Bruijn who wrote about them in 1946 (although it turned out that they had been constructed many years before by C. Flie Sainte-Marie). They have been used worldwide in telecomunications, and there have recen applications in biology.

Fig 4.18 page 84
Ian Anderson
A First Curse in Discrete Mathematics

Click to expand...

2048 with 4 bits, imagine with 6! >>> Sorry, I had to say five bits. Ch.

In his study on memory wheels the Dutch engineer K.Posthumus found that there is exactly one wheel for binari cuplets, two for binary triplets, 16 for binary quadruplets (4 bits) and 2048 forr binary quintuplets (5 bits). <he then conjectured that there are 2^((2^n-1)-n) different memory wheels for binary n-tuples . In 1946 de Bruijn established his conjecture.

Thomas Koshy
Discrete mathematics with applications
Page 703

Click to expand...

Did the chinese know these sequences?

Ver en Google Books
Sherman K. Stein:Mathematics: the man-made universe

Stein traced the first such memory wheel to India of about 1000 AD. The next use of a memory wheel was in France in 1882, where Emile Baudot used it for 32 quintuplet telegraphy. In this past century, memory wheels, also called de Bruijn cycles, have been used in a variety of applications, ranging from probability theory, coding, and communications.
Stein quotes the Sanskrit sutra, yamatarajabhanasalagam, which describes all possible triplets of short and long syllables, as evidence of the Indian knowledge of a memory wheel of length 3. Since Sanskrit metres are based on the system of short, laghu, and long, guru, syllables, represented traditionally by j and S (by us as 1 and 0), the sutra may be written as:
1000101110 which represents the sequences 100, 000, 001, 010, 101, 011, 111, 110
Subhash Kak
Yamatarajabhanasalagam: An Interesting Combinatoric Sutra
Indian Journal o history of Science

At: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.57.9025&rep=rep1&type=pdf

Click to expand...

See also:

http://hitxp.wordpress.com/2007/06/21/worlds-oldest-combinatoric-formula/

http://alexandria.tue.nl/repository/books/252901.pdf

I believe that chinese mathematicians didn´t know the sequences. Persons consulted don´t remember a circular arrangement similar to the posted in Abrahadabra.

Not strange if we think that the arrangement is not unique and that different diviners, by traying and error might have got different sequences all valid for its use. But for what use? Not for finding an hexagram in the Book of Changes, of course. Only for producing an hexagram by a quick method, like casting coins.

Maybe for personal use if a necklace or rosary of beads. Maybe for exhibition like a peculiarity, the multiplicity of results, given the lack of precise method maybe caused de low profile of the mechanism.

Yours,

Charly

Thanks Charley!

Wouldn't it be fun to have this design on a quilt?!!

Rosada

Great stuff, Charly, gracias.

I'll have to spend some time with it.

Un abrazo,

L

rosada said:

Thanks Charley!

Wouldn't it be fun to have this design on a quilt?!!

Rosada

Click to expand...

Hi, Ros:

I wonder if it is the same sequence thay you used in your necklace.

Have you read something in W/B about a MYSTERY SEQUENCE ?

I have read in Abrahadabra that is similar to the "CODE SEQUENCE", say one of de Bruijn sequences, but does say Wilhelm anything about wheels or necklaces?

Yours,

Charly

sparhawk said:

... I'll have to spend some time with it...

Click to expand...

Luis:

For our interests it's not so difficult as it seems. Do you remember some design like the CODE WHEEL in chinese sources? Do you believe that old chinese diviners have known something about these sequences? Not impossible if one thinks that the Canon of the Supreme Mystery could be written in Han times. Yang Hsiung would have understand de Bruijn sequences.

Un Abrazo,

Charly

charly said:

...
Have you read something in W/B about a MYSTERY SEQUENCE ?
...

Click to expand...

This is what Steve Marshall says of the MYSTERY SEQUENCE:

On the 'I Ching Sequencer' website it is possible to advance the hexagrams one at a time, as well as watch them loop. The three sequences run concurrently, with the 'mystery sequence' displayed largest. I'd never really taken a good look at this particular sequence at the back of Wilhelm-Baynes (pp 730–731, in the third edition), but it appears the animator is right, this is indeed a mystery. I have no idea at present what this sequence is or from where it originates (it doesn't appear in the first edition). But it is certainly a fascinating and aesthetically satisfying sequence when seen as a Flash animation. Notice that through the first 7 hexagrams a single yin line appears to rise up through the all-yang Qian hexagram. Then two yin lines appear to perform the same trick together. Then the trigram Kan rises up through Qian, which suggests that in the first two phases rather than a single yin and two yin rising up it is in fact the trigrams Li and Gen rising up, respectively. But by the 17th hexagram of the sequence this pattern is lost and one suspects that rather than a trigram rising up through a hexagram it is in fact a hexagram rising up through a hexagram, but that would require a more detailed study of the sequence, these are just a few provisional observations, first thoughts. By the 23rd in the sequence we see the familiar pattern again with three yin lines rising up together. By the end of the sequence, in the final seven hexagrams, we see a single yang line rising up through the all-yin hexagram Kun, just as a single yin rose up through all-yang Qian at the start.
from: http://www.biroco.com/yijing/sequence.htm

Click to expand...

I've not the complet W/B edition and I don't know if some of the Wilhelms said something about the sequence. Does somebody know who was te designer?

Following the descriptions I'm almost sure that it is a failed de-Bruijn sequence, say not a good solution.

I've just found a picture and a text, which I go to study, here:

http://iching.egoplex.com/mystery300w.jpg

Click to expand...

The source:

http://iching.egoplex.com/mystery-sequence.html

Charly

For my necklaces I use this pattern:

Hexagram 1,2,27,5,62,6,48,61,21,29 + 1 yin, 1 yang, 1 yang, 1 yin.

Ros

charly said:

...The source: ... http://iching.egoplex.com/mystery-sequence.html

Click to expand...

The Mistery Sequence must be read by columns.

Being 1=yang and 0=yin, the corresponding binary code, from bottom line to top line, for the first column is:

Row 1: 111111
Row 2: 011111
Row 3: 101111
Row 4: 110111
Row 5: 111011
Row 6: 111101
Row 7: 111110
Row 8: 001111
​

In the first column, rows 1 to 7 depict a de-Bruijn sequence.

See how taking off a digit from the right (= a line from the top) and adding a digit to the left (a line to the base) in every pair of hexagrams ...

• line 1 in the precedent corresponds to line 2 in the following
• line 2 in the precedent corresponds to line 3 in the following
• line 3 in the precedent corresponds to line 4 in the following
• line 4 in the precedent corresponds to line 5 in the following
• line 5 in the precedent corresponds to line 6 in the following
• line 6 in the precedent disappeared in the following

It seems that appearing a new line in the following hexagram causes the lines of the precedent to climb one position, overflowing the top line which disappears.

A movement from bottom to top.

In words of Steve "Notice that through the first 7 hexagrams a single yin line appears to rise up through the all-yang Qian hexagram."

But row 8 breaks the sequence.

Maybe the first digit of row 7 must be a 0 instead of a 1, then adding another 0 row 8 should be correct.

(to be continued)

Charly

De Bruijn Sequence:
All sequences must have 6 consecutive yin [:] lines together with
6 consecutive yang [|] lines
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

This sequence was built with 6 trailing yin lines []
The algorithm proceeds adding a yang line whenever it´s possible
without generating a duplicate hexagram, in which case a yin line is added.
This method is easy and quick but produces a disbalancement in the
sequence with more yang lines at the begining and more yin lines at the end.

Another method trying to add alternative yin/yang lines will produce
a more balanced result.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

| | | | | | : | | | | : : | | | : | : | | | : : : | | : | | : |

: : | | : : | : | | : : : : | : | : | : : : | : : | : : : : : :

____________________________________________________________________________

Generation of hexagrams contained in the cited de-Bruijn Sequence:
Base line at the left, top line at the right
One yin [:] or one yang [|] line appears from the left
The top line overflows by the right
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _


__________________________________________________________
_________________________________________________________
________________________________________________________
_______________________________________________________
______________________________________________________
_____________________________________________________ ___ H.1 KWS
____________________________________________________
___________________________________________________
__________________________________________________
_________________________________________________
________________________________________________
_______________________________________________
______________________________________________
_____________________________________________
____________________________________________
___________________________________________
__________________________________________
_________________________________________
________________________________________
_______________________________________
______________________________________
_____________________________________
____________________________________
___________________________________
__________________________________
_________________________________
________________________________
_______________________________
______________________________
_____________________________
____________________________
___________________________
__________________________
_________________________
________________________
_______________________
______________________
_____________________
____________________
___________________
__________________
_________________
________________
_______________
______________
_____________
____________
___________
__________
_________
________
_______
______
_____
____
___
__
_ ___ H.2 KWS

____________________________________________________________________________

Binary order of Hexagrams, 0 to 63:
Maximum binary order (63) belongs to H.1 in King Wen Sequence
Minimum binary order (00) belongs to H.2 in King Wen Sequence
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

01-03-07-15-31-63-62-61-59-55-47-30-60-57-51-39-14-29-58-53-43-23-46-
28-56-49-35-06-13-27-54-45-26-52-41-19-38-12-25-50-37-11-22-44-24-48-
33-02-05-10-21-42-20-40-17-34-04-09-18-36-08-16-32-00
____________________________________________________________________________
Warning: accuracy was not verified!

Charly

Wilhelm - Baynes said:

The individual lines enter the hexagram from below and leave it again at
the top.

From H.11 Peace

Click to expand...

This is compatible with most commentaries and only possible if the lines are in a circle or loop like a de Bruijn sequence.

All this sequences have necessarily a segment "000000111111" .

To compare different sequences we must align it by this segment.

If we accept that "111111" be the head segment and "000000" the tail of the sequence, the 6 heading hexagrams and the last will be always the same. I believe.


Head ♂
100000
110000
111000
111100
111110
111111 = H.1 KWS

0?????
00????
000???
0000??
00000?
000000 = H.2 KWS
Tail ♀

Another form of seeing it is that there are 7 fixed hexagrams, begining wit KUN, and in the middle it is Peace, the hexagrams from which we quote W/B at the begining of this post.

000000 = H.2 KWS
100000
110000
111000 = H.11 KWS (Peace!)
111100
111110
111111 = H.1 KWS

Not sure if it happens with all the valid sequences independently of the building method. I have to analyze it more.

Yours,

Charly

Hello; sorry to post to a year-old thread.

I found a few more of these:

russellcottrell.com/VirtualYarrowStalks/memoryWheels.htm

—Russell

Sorry, but

2D-key 0011

000 0 Do
001 1 Re
011 2 Mi
111 3 Re
101 2

(1*sqrt(0)+1*sqrt(1)+2*sqrt(2)+1*sqrt(3))*2/4=pi

3D-key 00010111

0000 0 Do
0001 1 Mi
0101 2 Re
0111 3 Mi
0011 2 Fa
1011 3 Re
1001 2 Mi
1101 3 Re
1111 4

(1*sqrt(0)+1*sqrt(1)+3*sqrt(2)+3*sqrt(3)+1*sqrt(4))*2/8=pi

5D-key 00000101100100011101010011011111

000000 0 Do
000001 1 Mi
000101 2 Re
000111 3 So
010111 4 Fa
011111 5 Mi
011011 4 Re
011001 3 So
001001 2 Do
001000 1 Mi
001100 2 Fa
000100 1 So
010100 2 Re
010110 3 Mi
010010 2 Fa
011010 3 So
001010 2 La
101010 3 Fa
100010 2 So
110010 3 Re
110000 2 Mi
110100 3 Fa
111100 4 So
101100 3 Re
101110 4 La
001110 3 Fa
000110 2 Mi
000010 1 Re
000000 0 So
010000 1 Fa
011000 2 Mi
011100 3 Re
011110 4

(2*sqrt(0)+5*sqrt(1)+10*sqrt(2)+10*sqrt(3)+5*sqrt(4)+1*sqrt(5))*2/31=pi

7D key - ?