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455.01
Foldability of Vector Equilibrium Four Great-Circle
Bow Ties: All of
the set of four great circles uniquely and discretely
describing the vector equilibrium can
be folded out of four whole (non-incised), uniformradius,
circular discs of paper, each
folded radially in 60-degree central angle increments,
with two diametric folds, mid-circle,
hinge-bent together and locked in radial congruence
so that their six 60-degree arc edges
form two equiangled spherical triangles, with one common
radius-pairing fastened
together at its external apex, that look like a bow
tie. The pattern corresponds to the
external arc trigonometry, with every third edgefold
being brought into congruence to
form great-circle-triangled openings at their top with
their pointed lower ends all
converging ice-cream-cone-like at the center of the
whole uncut and only radially folded
great circles. When the four bow ties produced by the
folded circles are assembled
together by radii congruence and locking of each of
their four outer bow-tie corners to the
outer bow-tie corners of one another, they will reestablish
the original four great-circle
edge lines of the vector equilibrium and will accurately
define both its surface arcs and its
central angles as well as locating the vector-equilibrium
axes of symmetry of its three
subsets of great-circle-arc-generating to produce, all
told, 25 great circles of symmetry.
When assembled with their counterpart foldings of a
total number corresponding to the
great-circle set involved, they will produce a whole
sphere in which all of the original great
circles are apparently restored to their completely
continuing-around-the-sphere integrity.
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