Then we can change the position of the obtained figure so that its "inside"
(shown in white) becomes its "outside" (the shaded side of the surface) and
vice-versa, simpl y b y moving i t a s a rigi d bod y i n spac e unti l th e hoop 1
occupies the position o f the hoop 2 . Onc e this is done, the previous defor -
mations performed i n reverse order result in the tube being turned inside out
as required.
Note that this procedure interchanges the "parallel" and the "meridian" of
the tube (see Figure 1.9).
1.5. Firs t w e perform th e deformation show n i n Figure 1.10 . Th e solid
thus obtaine d (provide d i t is elastic) ca n clearly be deformed int o th e one
shown i n Figure 1.1(a) . I t now remains t o apply th e solution o f Proble m
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