WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Identity function
Uncommon card · Science
Identity function, an Uncommon card
In mathematics, an identity function, also called an identity relation, identity map or identity transformation, is a function that always returns the value that was used as its argument, unchanged.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 50
- DEF
- 28
- Power
- 78
- Wikipedia reads a year
- 28,000
Power 78 (ATK + DEF): stronger than 20 % of WikiCards cards.
Identity function quiz: 3 questions
Three questions on the Identity function card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
That is, when f is the identity function, the ______ f = x is true for all values of x to which f can be applied.
Answer
equality. That is, when f is the identity function, the equality f = x is true for all values of x to which f can be applied. From the Identity function article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Puffery. Puffery 53 · Identity function 50 · Applied arts 47 · POLR3B 36 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Aqueous solution. Aqueous solution 59,000 · Graph of a function 36,000 · Identity function 28,000 · POLR3B 290 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.
- That is, when f is the identity function, the equality f = x is true for all values of x to which f can be applied.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Identity function article was read about 28,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 50 and blocks with 28: each hit it takes is cut by 11 %.
How to get Identity function
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 Identity function in the power ranking, all domains together.
- Caribbean cuisineUncommon · Society · ATK 50 DEF 28
- Applied artsUncommon · Science · ATK 47 DEF 31
- Hi-Point C-9Uncommon · History · ATK 51 DEF 27
- Malkajgiri Assembly constituencyUncommon · History · ATK 53 DEF 25
- PufferyUncommon · Science · ATK 53 DEF 25
- Désirée NosbuschUncommon · Arts · ATK 53 DEF 25
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, Identity function (revision), CC BY-SA 4.0. Photo : Qualc1, CC BY-SA 3.0, Wikimedia Commons.
