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projection. A projection is, roughly, a map from some space or object to another that omits some information on the object or space. For example, R 2 → R , ( x , y ) ↦ x {\displaystyle \mathbb {R} ^ {2}\to \mathbb {R} , (x,y)\mapsto x} is a projection and its restriction to a graph of a function, say, is also a projection.
Aristotle's wheel paradox: Rolling joined concentric wheels seem to trace the same distance with their circumferences, even though the circumferences are different. Carroll's paradox: The angular momentum of a stick should be zero, but is not. D'Alembert's paradox: Flow of an inviscid fluid produces no net force on a solid body.
Diceware. Diceware is a method for creating passphrases, passwords, and other cryptographic variables using ordinary dice as a hardware random number generator. For each word in the passphrase, five rolls of a six-sided die are required. The numbers from 1 to 6 that come up in the rolls are assembled as a five-digit number, e.g. 43146.
Mad Gab. Mad Gab is a board game involving words. At least two teams of 2–12 players have two minutes to sound out three puzzles. The puzzles are known as mondegreens and contain small words that, when put together, make a word or phrase. For example, "These If Hill Wore" when pronounced quickly sounds like "The Civil War".
A German rebus, circa 1620. A rebus (/ ˈriːbəs / REE-bəss) is a puzzle device that combines the use of illustrated pictures with individual letters to depict words or phrases. For example: the word "been" might be depicted by a rebus showing an illustrated bumblebee next to a plus sign (+) and the letter "n". It was a favourite form of ...
An American-style crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter ...
If you needed to someone to toss a game-winning shot, this would be your guy. "T," Rufus guessed on "Wheel of Fortune." "One T," answered host Pat Sajak. "Championship match," Rufus answered. "Yeah,
t. e. Word games are spoken, board, card or video games often designed to test ability with language or to explore its properties. Word games are generally used as a source of entertainment, but can additionally serve an educational purpose. Young children can enjoy playing games such as Hangman, while naturally developing important language ...