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The number of subsets of set a a b 1 is

In this paper we consider the Golomb topology $\tau _G$ on the set $\mathbb \{N\}$ of natural numbers, as well as the Kirch topology $\tau _K$ on $\mathbb \{N\}$. Then we examine subsets of these spaces which are totally Brown. Too late to answer, but an iterative approach sounds easy here: 1) for a set of n elements, get the value of 2^n.There will be 2^n no.of subsets. (2^n because each element can be either present(1) or absent(0). So for n elements there will be 2^n subsets. ). Eg: for 3 elements, say {a,b,c}, there will be 2^3=8 subsets.

Example 29 List all the subsets of the set { –1, 0, 1 }. Let A= { –1, 0, 1} Number of elements in A is 3 Hence, n = 3 Number of subsets of A = 2n where n is the number of.

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