Rare card

Closed set

Value

50 W

Attack

265

Defence

212

Players

0

In topology, a branch of mathematics, a closed set is a set that contains all of its boundary points. An example is the closed interval [ a , b ] {\displaystyle [a,b]} , which is closed in the real line because it includes both points a {\displaystyle a} and b {\displaystyle b} of its boundary.

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