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WikiCards · Card list · Science cards · Hadamard transform
Uncommon card · Science
Hadamard transform, an Uncommon card
The Hadamard transform is an example of a generalized class of Fourier transforms.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 68
- DEF
- 49
- Power
- 117
- Wikipedia reads a year
- 45,000
Power 117 (ATK + DEF): stronger than 55 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- It performs an orthogonal, symmetric, involutive, linear operation on a tuple of 2m numbers.
- The Hadamard transform can be regarded as being built out of size-2 discrete Fourier transforms, and is in fact equivalent to a multidimensional DFT of size 2 × 2 × ⋯ × 2 × 2.
- It decomposes an arbitrary input vector into a superposition of Walsh functions.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Hadamard transform article was read about 45,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 68 and blocks with 49: each hit it takes is cut by 20 %.
How to get Hadamard transform
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.
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Card lists
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Credits
Text : Wikipedia, Hadamard transform (revision), CC BY-SA 4.0. Photo : Watchduck You can name the author as "T. Piesk", "Tilman Piesk" or "Watchduck"., Public domain, Wikimedia Commons.
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