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A minor nitpick... 'cardinality' in mathematics refers to a set of infinities. The set of all integers has a certain cardinality, which is equal to the cardinal
by brilee 14y ago
A minor nitpick... 'cardinality' in mathematics refers to a set of infinities. The set of all integers has a certain cardinality, which is equal to the cardinality of all rational numbers, but which is smaller than the cardinality of all irrational numbers.
"Size estimation" is sufficient; no need to get fancy with words you don't know the meaning of.
- code0 14y agoThe OP is correct. Cardinality in mathematics is the number of elements in a set[1]. What you are probably referring to is the concept of cardinal numbers[2]. I guess you can skip the smug tone. [1] http://en.wikipedia.org/wiki/Cardinality http://en.wikipedia.org/wiki/Cardinality [2] http://en.wikipedia.org/wiki/Cardinal_number http://en.wikipedia.org/wiki/Cardinal_number
- Sniffnoy 14y agoHe can't even claim that. Cardinal numbers include the finite cardinals, after all.
- lotharbot 14y agoHis usage is correct. Cardinality refers to the size of any set. This includes finite, countable, and uncountable sets. The sequence of cardinal numbers is transfinite: 0, 1, 2, ... , n, ..., aleph_0, aleph_1, ... http://en.wikipedia.org/wiki/Cardinality http://en.wikipedia.org/wiki/Cardinality http://en.wikipedia.org/wiki/Cardinal_number http://en.wikipedia.org/wiki/Cardinal_number
- arnarbi 14y ago> no need to get fancy with words you don't know the meaning of. If you want to write things that leave no room for you being mistaken, it is a good idea to double check what you are saying. https://www.google.com/webhp?#hl=en&q=cardinality&tbs=dfn:1 https://www.google.com/webhp?#hl=en&q=cardinality&tb...
- deleted 14y ago[deleted]
- mikeash 14y agoThe irony of your crushingly ignorant post nearly killed me.