# What is a chemlambda quine?

UPDATE 3: I made a landing page for my pages to play and learn.

UPDATE 2: And now there is Fractalize!

UPDATE: The most recent addition to the material mentioned in the post is Find a Quine, which let you generate random 10 nodes graphs (there are 9 billion of them) and to search for new quines. They are rare, but today I found 3 (two all of them are shown as examples).  If you find one, mail me the code (instructions on the page).

__

The ease of use of the recently written chemlambda.js makes easier the sharing of past ideas (from the chemlambda collection) and as well of new ideas.

Here is some material and some new thoughts. Before this, just recall that the *new* work is in hapax. See what chemlambda has to do with hapax, especially towards the end.

A video tutorial about how to use the rest of new demos.

The story of the first chemlambda quine, deduced from the predecessor of a Church number. Especially funny is that this time you are not watching an animation, it happens in front of you 🙂

More quines and random eggs, if you want to go further in the subject of chemlambda quines.  The eggs are 4-nodes graphs (there are 720 of them). They manifest an amazing variety of behaviour. I think that the most interesting is that there are quines and there are also graphs which have a reversible evolution, without being quines. Indeed, in chemlambda a quine is one which has a periodic evolution (thus is reversible) under the greedy algorithm of rewrites. But there is also the reversible, but not quine case, where you can reverse the evolution of a graph by picking a sequence of rewrites.

Finally, if you want to look also at famous animations, you have the feed the quine. This contains some quines but also some other graphs which featured in the chemlambda collection.

Most of all, come back to see more, because I’m going to update and update…

# Feed the quine!

The chemlambda.js version of chemlambda-v2 made by ishanpm allows to understand how quines work in chemlambda. See this previous post about chemlambda.js.

So, now you may feed the quine.

UPDATE: Ishan made a github repository for his chemlambda.js. I suggest you follow his work if you are a chemlambda fan, there is big promise there.  The github page is live here. See if you can contribute to one of the issues at his repository, or to one of the issues at the chemlambda repository.

For me this chemlambda.js is pure gold, for many reasons: it does all the computation/visualization in one place, it may give a way to recover the work lost from the chemlambda collection, and as a work of art. Not to say that it will be certainly connected with hapax.

If you wonder why I don’t update the chemlambda repo readme with his important contribution, I refrain from touching that repository. Probably a new one which forks all the contributions in one place is better. This autumn.

I’ve also made a second page “feed the quine“, it has presently more examples  (not anymore) and it is compatible es5. Both pages change very often, so at any point one may be more advanced than the other.

# Play with quines in the chemlambda editor

ishanpm made a wonderful chemlambda editor prototype and I enjoyed playing with the 9_quine. It looks like this (screencast, real speed)

You can do the same, or other stuff! You need a mol file to input, for example I took the mol file of the 9_quine from here.  You can pick from lots of them (not guaranteed all of them work yet in the editor, especially those with “bb” in the name), from the chemlambda collection of molecules.

Is much much better than the animation made by hand

I look forward for a convergence with hapax, it would be nice to make a gamelike “feed the quine” where you have the “tokens” which make the reactions happen and you feed them with the mouse to the quine, etc.

UPDATE: this time I used bigpred-train and I let it reduce automatically, gives this psihedelic

# Chemlambda and hapax

I wrote an expository text about chemlambda and hapax (and interaction combinators). You can see clearly there how hapax works differently and, as well, clear exposition of several conventions used, about the type of graphs and the differences in the treatment of rewrites.

Chemlambda and hapax

# What is the purpose of the project Hapax?

“hapax” means “only once” in ancient Greek. You may have seen it in the form hapax legomenon, quote: ” a word that occurs only once within a context, either in the written record of an entire language, in the works of an author, or in a single text”.

After a bit of research I found the correct, I hope, form that I  use for this project:

It reads “hapax cheon” and it means, again in ancient Greek, “poured only once”.

Why this? Because, according to this wiki link, “the Greek word χυμεία khumeia originally meant “pouring together””.

The motivation of the project hapax comes from the realization that we only explored a tiny drop in the sea of possibilities. As an example, just look at lambda calculus, one of the two pillars of computation. Historically there are many reasons to consider lambda calculus something made in heaven, or a platonic ideal.

But there are 14400 = 5! X 5! alternatives to the iconic beta rewrite only. Is the original beta special or not?

By analogy with the world of CA, about a third of cellular automata are Turing universal. My gues is that a significant fraction of the alternatives to the beta rewrite are as useful as the original beta.

When we look at lambda calculus from this point of view, we discover that all the possible alternatives, not only of beta, but of the whore graph rewriting formalism, say in the form of chemlambda, all these alternative count a huge number, liek 10^30 in the most conservative estimates.

Same for interaction combinators. Same for knot theory. Same for differential calculus (here I use em).

I started to collect small graph rewrite systems which can be described with the same formalism.

The formalism is based on a formulation which uses exclusively permutations (for the “chemistry”  and Hamiltonian mechanics side) and a principle of dissipation which accounts for the probabilistic side.

The goal of the project hapax is to build custom worlds (physics and chemistry)

“poured only once”

which can be used to do universal computation in a truly private way. Because once the rules of computation are private,  this leads to the fact that the who;le process of computation becomes incomprehensible.

Or is it so? Maybe yes, maybe not. How can we know, without trying?

That is why I starded to make the hapax stuff.

For the moment is not much, only demos like this one, but the rest will pass from paper to programs, then we’ll play.

# Chemlambda collection samples

I started a page of chemlambda collection samples. I would rather put videos like this one  (I have hours of them) which I used in this presentation.

However soon there will be a playable chemlambda thing 🙂

# Hapax chemlambda

Chemistry is a game with a pair of dices.

You roll two dices and act. The dices are permutohedra.

Which leads to ask what certain chemistries (artificial or real) have so special. The conjecture is that (probabilistically speaking) a sizeable proportion of them are special.

For example, we can evade the lambda calculus by choosing one of the  14400 rewrites for ( β with random right patterns) .

Hapax chemlambda!