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Math Help - Cardinality

  1. #1
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    Cardinality

    I am very confused on how to answer these questions. I am supposed to find the cardinality of each of these sets.

    1) non zero
    2) {non zero}
    3) {nonzero, {nonzero}}
    4) {nonzero, {nonzero}, {nonzero, {nonzero}}}
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  2. #2
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    Quote Originally Posted by lm6485 View Post
    I am very confused on how to answer these questions. I am supposed to find the cardinality of each of these sets.
    1) non zero
    2) {non zero}
    3) {nonzero, {nonzero}}
    4) {nonzero, {nonzero}, {nonzero, {nonzero}}}
    That cannot be the complete question because as written it makes no sense whatsoever.
    Non-zero what?
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  3. #3
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    Sorry I was given the wrong problem. Instead of non zero's they are supposed to be null or empty sets.
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  4. #4
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    Quote Originally Posted by lm6485 View Post
    Sorry I was given the wrong problem. Instead of non zero's they are supposed to be null or empty sets.
    \emptyset has no elements.

    \{\emptyset\} has one element.

    \{\emptyset,\{\emptyset\}\} has two elements.
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