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fixed ball self-homeomorphic
free arc
A
free arc
in
X
is any subset of
X
of the form
where
A
is an arc in
X
with
end points
x
and
y
and
is open in
X
.
Janusz J. Charatonik, Pawel Krupski and Pavel Pyrih
2001-02-21
where A is an arc in X with
end points x and y and