halfway model
English
Noun
halfway
model
(
plural
halfway models
)
(
topology
)
An
immersion
of the
sphere
S
2
{\displaystyle S^{2}}
in
R
3
{\displaystyle \mathbb {R} ^{3}}
, which is the halfway point of a
sphere
eversion
.
in 
, which is the halfway point of a sphere eversion.