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WikiCards · Card list · Science cards · Category theory
Uncommon card · Science
Category theory, an Uncommon card
Category theory is a general theory of mathematical structures and their relations.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 71
- DEF
- 38
- Power
- 109
- Wikipedia reads a year
- 170,000
Power 109 (ATK + DEF): stronger than 60 % of WikiCards cards.
Category theory quiz: 3 questions
Three questions on the Category theory card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Category theory can be used in most areas of ______.
Answer
mathematics. Category theory can be used in most areas of mathematics. From the Category theory article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Antihero. Antihero 270,000 · Category theory 170,000 · Brie 130,000 · Triple point 91,000 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.
- It was introduced by Samuel Eilenberg and Saunders Mac Lane in the mid-20th century in their foundational work on algebraic topology.
- Category theory can be used in most areas of mathematics.
- In particular, many constructions of new mathematical objects from previous ones that appear similarly in several contexts are conveniently expressed and unified in terms of categories.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Category theory article was read about 170,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 71 and blocks with 38: each hit it takes is cut by 15 %.
How to get Category theory
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 Category theory in the power ranking, all domains together.
- ExtortionRare · Society · ATK 65 DEF 44
- OhmUncommon · Science · ATK 68 DEF 41
- Outsider artUncommon · Arts · ATK 67 DEF 43
- James WolkUncommon · Arts · ATK 65 DEF 44
- Bay of BiscayUncommon · Nature · ATK 62 DEF 47
- Charles PerraultUncommon · Arts · ATK 66 DEF 43
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, Category theory (revision), CC BY-SA 4.0. Photo : User:Cepheus, Public domain, Wikimedia Commons.
