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WikiCards · Card list · Science cards · Ramanujan–Soldner constant
Common card · Science
Ramanujan–Soldner constant, a Common card
In mathematics, the Ramanujan–Soldner constant is a mathematical constant defined as the unique positive zero of the logarithmic integral function.
- Rarity
- Common
- Domain
- Science
- ATK
- 30
- DEF
- 5
- Power
- 35
- Wikipedia reads a year
- 8,300
Power 35 (ATK + DEF).
Ramanujan–Soldner constant quiz: 3 questions
Three questions on the Ramanujan–Soldner constant card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
It is named after ______ Ramanujan and Johann Georg von Soldner.
Answer
Srinivasa. It is named after Srinivasa Ramanujan and Johann Georg von Soldner. From the Ramanujan–Soldner constant article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Ramanujan–Soldner constant. Ramanujan–Soldner constant 8,300 · Vadodara Urban Development Authority 1,000 · Fernand Bisson de La Roque 270 · Zamazaan 180 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 is named after Srinivasa Ramanujan and Johann Georg von Soldner.
- Its value is approximately μ ≈ 1.45136923488338105028396848589202744949303228… Since the logarithmic integral is defined by l i = ∫ 0 x d t ln t, then using l i = 0, we have l i = l i − l i = ∫ 0 x d t ln t − ∫ 0 μ d t ln t = ∫ μ x d t ln t, thus easing calculation for numbers greater than μ.
- Also, since the exponential integral function satisfies the equation l i = E i, the only positive zero of the exponential integral occurs at the natural logarithm of the Ramanujan–Soldner constant, whose value is approximately ln ≈ 0.372507410781366634461991866…
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ramanujan–Soldner constant article was read about 8,300 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 30 and blocks with 5: each hit it takes is cut by 2 %.
How to get Ramanujan–Soldner constant
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Credits
Text : Wikipedia, Ramanujan–Soldner constant (revision), CC BY-SA 4.0. Photo : Hankn2018, CC0, Wikimedia Commons.
