A type of negative spaceship travelling through
the zebra stripes agar. The center of the bubble is simple empty
space, and the length and/or width of the bubble can usually be
extended to any desired size.
Below is a small stabilized section of agar containing a sample
lightspeed bubble, found by Gabriel Nivasch in August 1999. The
bubble travels to the left at the speed of light, so it will
eventually reach the edge of any finite patch and destroy itself and
its supporting agar.
An open problem related to lightspeed bubbles was whether large
extensible empty areas could be created whose length was not
proportional to the width (as it must be in the above case, due to
the tapering back edge). This was solved in February 2017 by Arie
Paap; a simple period-2 solution is shown below.
Game of Life Explanation
The Game of Life is not your typical computer game. It is a cellular
automaton, and was invented by Cambridge mathematician John Conway.
This game became widely known when it was mentioned in an article
published by Scientific American in 1970. It consists of a grid of
cells which, based on a few mathematical rules, can live, die or
multiply. Depending on the initial conditions, the cells form various
patterns throughout the course of the game.
Rules
For a space that is populated:
Examples
Each cell with one or no neighbors dies, as if by solitude.
Each cell with four or more neighbors dies, as if by
overpopulation.
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