Gδ
Translingual
Etymology
From
German
Gebiet
(
“
neighborhood
”
)
for 'G' and German
Durchschnitt
(
“
intersection
”
)
for the 'δ'.
Symbol
G
δ
(
mathematical analysis
,
topology
)
A
countable
intersection
of
open sets
.
Hypernyms
Borel set