Question

The cardinal number of null set


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Answer 1

Answer:

Step-by-step explanation:

The cardinal number for an empty set is zero. Example: Let C = {#, $, %, &}. Show n(C) = 4. Hence, C is equivalent to {1, 2, 3, 4} and n(C) = 4 since a 1-1 correspondence can be setup between C and {1, 2, 3, 4}.

Answer 2

Answer:

number 3 is called the cardinal number, or cardinality, of the set {1, 2, 3} as well as any set that can be put into a one-to-one correspondence with it. (Because the empty set has no elements, its cardinality is defined as 0.)

OR

The cardinal number for an empty set is zero. Example: Let C = {#, $, %, &}. Show n(C) = 4. Hence, C is equivalent to {1, 2, 3, 4} and n(C) = 4 since a 1-1 correspondence can be setup between C and {1, 2, 3, 4}.

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