Way to remember the definition of local finiteness


I really struggled to remember this definition.

Eventually, I hit upon this idea: a set of subsets is locally finite if every point in the space is close to only finitely many of those sets, where close means “has a neighborhood intersecting”.

Related Posts

Double Date

Worse Than a Sranc

thanks whole foods lady

Another way of doing big O notation

Compactness of the Classical Groups

Derivative AT a Discontinuity

Just because 2 things are dual, doesn't mean they're just opposites

Boolean Algebra, Arithmetic POV

discontinuous linear functions

Continuous vs Bounded