In mathematics, a branched covering is a map that is almost a covering map, except on a small set. == In topology == In topology, a map is a branched covering if it is a covering map everywhere except for a nowhere dense set known as the branch set.
In mathematics, a branched covering is a map that is almost a covering map, except on a small set. == In topology == In topology, a map is a branched covering if it is a covering map everywhere except for a nowhere dense set known as the branch set.
Source: Wikipedia "Branched covering" · CC BY-SA 4.0
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