npub13c…mkmh9 on Nostr: I wonder what's more common, for people to call a set like {(x,y) ∊ X : 0<d(x,y)<r} ...
I wonder what's more common, for people to call a set like {(x,y) ∊ X : 0<d(x,y)<r} a deleted disk or a punctured disk. (or deleted ball/punctured ball?)
#math
Published at
2024-08-04 15:45:57Event JSON
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