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Intro to Life32.

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Presentation on theme: "Intro to Life32."— Presentation transcript:

1 Intro to Life32

2 Zoom to 10 (magnifying glass)
That will allow you to see the grid and individual cells

3 2) Select draw mode in options
That will allow you to create “live” cells (dark)

4 3) Draw 3 live cells, and press the “step” to see what happens in each iteration

5 4) Under the “Game” menu look at the “rules”.
Every cell has 8 nearest neighbors Survival: how many neighbors to stay alive Birth: how many to go from dead to alive

6 Limit cycles in cellular automata
Repeated behavior is a limit cycle, just like we saw in logistic map. Starting at xt = 0.5 and R = 3.2 we have a 2 period limit cycle

7 Add one cell atop the center
Add one cell atop the center. We see a transient as the CA settles into a new basin of attraction After 9 steps, this CA settles into a limit cycle. At R= 3.2, and starting from x=0.5, it takes about 9 steps before the logistic map settles into its limit cycle.

8 4 period Limit cycle in CA
Starting at xt = 0.5 and R = 3.5 4 period in logistic map.

9 CA can also create deterministic chaos
From games menu, open folder lifep, and select Acorn. This is not true deterministic chaos but it takes 5206 generations to stabilize! Chaos in a 1D CA. The pattern one row; each iteration provides the next row as it moves down the screen. If the width is unlimited, the time to stabilize can be unlimited as well: deterministic chaos. Starting at xt = 0.2 and R = 4 we see a chaotic attractor. The values will never repeat.


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