qiudanz tag notes

src/ahora.gmo

@@ -4,7 +4,7 @@ en qué andamos aproximadamente en estos momentos.
 
 # ahora
 
-preparando uno de nuestros siguientes {performances} usando la {qiudanz technique} para el Hybrid Live Coding Interfaces 2022. registro en {qiudanz devlog}, en inglés.
+preparando uno de nuestros siguientes {performances} usando la {qiudanz technique} para el Hybrid Live Coding Interfaces 2022. más información en {qiudanz tag} y registro del proceso en {qiudanz devlog}, en inglés.
 
 preparando y publicando actualizaciones a nuestro {tutorial de uxn}.
 

src/log.txt

@@ -1,3 +1,4 @@
+2022-12-04T11:00:00+01:00	wrote guiding notes for the qiudanz tag exploration that we will be showcasing on the Hybrid Live Coding Interfaces 2022 workshop.	{qiudanz tag}
 2022-11-13T19:00:00+01:00	new version (1.0.4) of introduction to uxn programming e-book: launcher and raw runes	{introduction to uxn programming book}
 2022-10-31T12:00:00+01:00	accepted in the Hybrid Live Coding Interfaces 2022 workshop with our qiudanz technique proposal	{qiudanz devlog}
 2022-10-03T19:00:00+02:00	applied to the Hybrid Live Coding Interfaces 2022 workshop	{qiudanz devlog}

src/now.gmo

@@ -4,7 +4,7 @@ what are we up to approximately now.
 
 # updates
 
-preparing for one of our next {performances} using the {qiudanz technique} for the Hybrid Live Coding Interfaces 2022 workshop. see {qiudanz devlog}
+preparing for one of our next {performances} using the {qiudanz technique} for the Hybrid Live Coding Interfaces 2022 workshop. we will showcase an experiment called {qiudanz tag}. see {qiudanz devlog}
 
 publishing updates to our {intro to uxn programming} e-book and {uxn tutorial}.
 

src/performances.gmo

@@ -6,14 +6,13 @@ see also {talks and workshops}
 
 # upcoming
 
-we will present a small experiment using the {qiudanz technique} in the Hybrid Live Coding Interfaces Workshop 2022
+we will present a small experiment called {qiudanz tag} using the {qiudanz technique} in the Hybrid Live Coding Interfaces Workshop 2022
 
 => https://hybrid-livecode.pubpub.org/workshop2022 Workshop 2022 - Hybrid Live Coding Interfaces
 dec 6 & 7, 12022
+9:30 am EST
 online
 
-program to be confirmed.
-
 # past
 
 ## 12022

src/qiudanz_devlog.gmo

@@ -6,6 +6,10 @@ this devlog started in the context of our micro-residency in slomoco (12021) and
 
 => https://www.slomoco.surf/projects/qiudanz-technique qiudanz technique on SloMoCo
 
+# 12022-12-04 qiudanz tag notes
+
+we wrote guiding notes for the {qiudanz tag} exploration that we will be showcasing on the Hybrid Live Coding Interfaces 2022 workshop.
+
 # 12022-10-31 accepted in the Hybrid Live Coding Interfaces 2022 workshop
 
 our intention is to experiment with a generative approach, performing live and human-powered computation based on the {qiudanz technique} and tag systems ({danzasistemas-tag}) to expand and contract a movement sequence.

src/qiudanz_tag.gmo

@@ -0,0 +1,144 @@
+# qiudanz tag
+
+exploring tag systems with the {qiudanz technique}.
+
+# background
+
+the idea of exploring tag systems with movement sequences originated as {danzasistemas-tag}, and the {qiudanz technique} was devised as a way to explore it using the same language that could be used for other types of abstract machines.
+
+# cyclic tag systems
+
+cyclic tag systems can be explored by using {qiudanz mode 1} only, with a vocabulary consisting in DEH (-), IN (+), CHO (.) for the movement sequences and rules.
+
+## list of rules
+
+we need an ordered list of rules. each rule indicates what symbol(s) to add at the tail of the movement sequence IF AND ONLY IF the head is IN (+). 
+
+additionally, each rule always applies a DEH (-) operation, removing the head from the sequence.
+
+an abbreviated list of rules could look like the following:
+
+```
+0: [ + - - ]
+1: [ + - ]
+```
+
+unabbreviated, and using pseudocode along with qiudanz operations (DEH (-) and IN (+)), we could write it as follows:
+
+```
+rule 0:
+  if HEAD is + then: -, ++, +-, +-
+  else: - 
+
+rule 1:
+  if HEAD is + then: -, ++, +-
+  else: -
+```
+
+## the process
+
+in a cyclic tag system, the idea is to apply the rules sequentially and cyclically. a given sequence will always have its head truncated, but it may have its tail growing depending on the element that was at the head.
+
+### example, in conversation
+
+we can perform this process with a pair of people: the tape and the guide.
+
+the tape will:
+* dance the movement sequence 
+* apply the operations given by the guide.
+
+the guide will:
+* keep track of the position in the list of rules 
+* evaluate the head of the movement sequence 
+* give the tape the corresponding instructions
+
+ideally, the guide will communicate via another movement sequence.
+
+for instance, using our rules described above:
+
+```
+0: [ + - - ]
+1: [ + - ]
+```
+
+the tape starts with a single movement:
+
+```
+tape: [ + ] .
+```
+
+the guide will apply rule 0. because the head of the sequence is IN (+), there have to be additions to the sequence.
+
+the guide indicates the set of instructions to apply:
+
+```
+guide: - ++ +- +- .
+```
+
+the tape proceedes following the instructions, removing the head and then inserting elements at the tail. it responds:
+
+```
+tape: [ + - - ] .
+```
+
+now the guide will apply rule 1. because the head of the sequence is IN (+), there will be additions:
+
+```
+guide: - ++ +- .
+```
+
+the tape processes the instructions and responds:
+
+```
+tape: [ - - + - ] .
+```
+
+now the guide will apply rule 0. because the head of the sequence is DEH (-), there will not be additions:
+
+```
+guide: - .
+```
+
+the tape responds:
+
+```
+tape: [ - + - ] .
+```
+
+now the guide will apply rule 1. because the head of the sequence is DEH (-), there will not be additions:
+
+```
+guide: - .
+```
+
+the tape now responds:
+
+```
+tape: [ + - ] .
+```
+
+next time there will be additions, and so on.
+
+the cycle continues on and on.
+
+## other interesting rulesets
+
+the example list of rules given by wolfram in a new kind of science is:
+
+```
+0: [ + + ]
+1: [ + - ]
+```
+
+# universality
+
+a cyclic tag system can emulate a tag system, and a tag system can emulate a turing machine. therefore, it is possible to devise a (cyclic) tag system that emulates an universal turing machine.
+
+=> https://wpmedia.wolfram.com/uploads/sites/13/2018/02/15-1-1.pdf Cook, Matthew (2004). "Universality in Elementary Cellular Automata" (PDF). Complex Systems. 15: 1–40.
+
+this could work as an alternative approach to {d-turing}, or even to {dancing a universal turing machine}. 
+
+# references
+
+=> https://www.wolframscience.com/nks/p93--tag-systems/ Tag Systems: A New Kind of Science | Online by Stephen Wolfram
+=> https://www.wolframscience.com/nks/p95--cyclic-tag-systems/ Cyclic Tag Systems: A New Kind of Science | Online by Stephen Wolfram

src/qiudanz_technique.gmo

@@ -45,11 +45,9 @@ these transformations can be represented with the corresponding movements of the
 * DEH: remove movement from the head
 * IN x: append movement x as a new tail
 
-these transformations are enough to perform tag systems, cyclic or not.
+these transformations are enough to perform tag systems, cyclic or not. see {qiudanz tag} and also {danzasistemas-tag}.
 
-see also {danzasistemas-tag}.
-
-=> ./qiudanz_mode_1.gmi {qiudanz mode 1}
+this first mode is elaborated further in {qiudanz mode 1}.
 
 ## mode 2