WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Bijection
Uncommon card · Science
Bijection, an Uncommon card
In mathematics, a bijection, bijective function, or one-to-one correspondence is a function between two sets such that each element of the second set is the image of exactly one element of the first set.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 65
- DEF
- 52
- Power
- 117
- Wikipedia reads a year
- 79,000
Power 117 (ATK + DEF): stronger than 65 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Given a function f : A → B, the image of an element a ∈ A is the element f ∈ B in the codomain.
- The pre-image of an element b ∈ B is any element a ∈ A in the domain such that f = b.
- Equivalently, a bijection is a relation between two sets such that each element of either set is paired with exactly one element of the other set.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Bijection article was read about 79,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 65 and blocks with 52: each hit it takes is cut by 21 %.
How to get Bijection
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 Bijection in the power ranking, all domains together.
- EbroUncommon · Nature · ATK 67 DEF 50
- Gaussian quadratureUncommon · Science · ATK 74 DEF 43
- Leon Isaac KennedyUncommon · Arts · ATK 64 DEF 53
- Symphony No. 5Uncommon · Arts · ATK 66 DEF 51
- Winchester '73Uncommon · Arts · ATK 64 DEF 53
- AuditUncommon · Science · ATK 69 DEF 48
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, Bijection (revision), CC BY-SA 4.0. Photo : Schapel, Public domain, Wikimedia Commons.
