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WikiCards · Card list · Science cards · Aleph number
Uncommon card · Science
Aleph number, an Uncommon card
In mathematics, particularly in set theory, the aleph numbers are a sequence of numbers used to represent the cardinality of infinite sets.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 63
- DEF
- 35
- Power
- 98
- Wikipedia reads a year
- 160,000
Power 98 (ATK + DEF): stronger than 40 % of WikiCards cards.
Aleph number quiz: 3 questions
Three questions on the Aleph number card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Continuing in this manner, it is possible to define an ______ cardinal number ℵ α for every ordinal number α, as described below.
Answer
infinite. Continuing in this manner, it is possible to define an infinite cardinal number ℵ α for every ordinal number α, as described below. From the Aleph number article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Ampere. Ampere 210,000 · Aleph number 160,000 · Jesus Lau 240 · Claribel Wheeler 160 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- They were introduced by the mathematician Georg Cantor and are named after the symbol he used to denote them, the Hebrew letter aleph.
- The smallest cardinality of an infinite set is that of the natural numbers, denoted by ℵ 0, the next larger cardinality of a well-ordered set is ℵ 1, then ℵ 2, then ℵ 3, and so on.
- Continuing in this manner, it is possible to define an infinite cardinal number ℵ α for every ordinal number α, as described below.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Aleph number article was read about 160,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 63 and blocks with 35: each hit it takes is cut by 14 %.
How to get Aleph number
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Aleph number in the power ranking, all domains together.
- Kevin SchadeRare · Society · ATK 59 DEF 39
- AmpereRare · Science · ATK 62 DEF 36
- Bernoulli distributionRare · Science · ATK 59 DEF 39
- BandicootUncommon · Nature · ATK 60 DEF 38
- HadronUncommon · Science · ATK 61 DEF 37
- Air superiority fighterUncommon · Science · ATK 57 DEF 41
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Aleph number (revision), CC BY-SA 4.0. Photo : PNG made by Maksim , SVG made by Amada44, Public domain, Wikimedia Commons.
