01 September 2009:
Ah yes, this date brings memories. It was a time when everything started. If not for that particular meeting, the recurrent compression would have to be done by someone else. But it is as it is. Let me tell you a story about two guys, sharing the apartment that have met in the corridor. Our meetings have been rare and very often ended up in long discussions about irrelevant stuff, computer stuff. Why, what and how this particular question was asked is irrelevant (we do not remember, but "irrelevant" sounds more convincing). The question was: "Why can’t we compress files multiple times?" After using our general knowledge we formulated two additional questions: "Is it impossible to pack packed file?"; "Nobody is interested in recurrent compression?" Our conclusion was obvious that we have to investigate it. At this point we have had our meetings more regularly (probably bimonthly).

22 May 2010:
This particular time was chosen as a milestone because we have agreed on one very important statement then: "Recurrent compression of the files is possible". Of course, we have here in mind lossless compression. Unfortunately, the answer to the main question generated new questions and again, we had a couple of new things to think about. One of the questions was: "Where do we have compression in nature?" (actually, this question is still not answered. Computers use binary system, and nature is very rarely "on" or "off" - so maybe it is the reason?). The more important one was: "If there is one way, does it mean, there is another one?" Why did we ask ourselves that? Because we wanted an effective way to compress files. I will tell you a secret, the first algorithm that we used was very, very, very slow.

12 July 2011:
Another year passed during which we have made quite unsuccessful effort to find more information regarding recurrent packing. The conclusion was: "There is no information about recurrent compression". Well, probably there are some PhD thesis about this or that, but it is not easy to find, especially if it is not written in English. Anyway, our own studies have brought us general information: "There are many ways to compress files". As previously it generated some more questions. Here I will only mention two most important and interconnected: "Which method to investigate thoroughly?" and "How to distinguish, which ideas are worth pursuing?" We can quarrel about wording, but as we have known from previous calculations we haven’t been able to change all ideas into workable methods (we knew more and more, but we still know much too little).

20 September 2012:
The wall. The impenetrable wall. The point of no return. Now we have been sure that the first algorithm is too slow to proceed. We have been using it from the very beginning and tried to get answers for more and more complicated questions. Estimated time of calculations now reached more than months. In some areas of interest it was years of computations. It is easy to guess what our curse of action was and what questions lead us there. If you are in a hurry and do not want to guess what the author has in his mind here are the questions: "what are the more effective ways of calculation?" or "are Statistics useful?". We had enough data to make choices.

01 December 2013:
This was quite an eventful year. Not only our second method was too slow to proceed, but we had a usable algorithm. What else do we want to improve? Thinking, positive thinking. How do we want to do it? I can tell you a joke, an old joke: "Problem? Nah, opportunity in disguise!"