Mathematics and Origami
The spatial figure tends to collapse into the plane XZ as seen in Fig. 6: all the circles
taking part in it appear surrounded by a new ellipse. The shortening of axis a requires an effort
similar to that needed to actuate against a compression spring.
4
C ́ C
O
✁^14
✁ ✁
✁
✁
13
✁
12
11
24
21
17
27
15
23
16
22
26
25
5
O
B
B
C
C
AA
X
Y
2
1
1
1
2
2