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Combinatorics on words is a fairly new field of mathematics, branching from combinatorics, which focuses on the study of words and formal languages. The subject looks at letters or symbols, and the sequences they form. Combinatorics on words affects various areas of mathematical study, including algebra and computer science. There have been a ...
The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
The term four-letter word serves as a euphemism for words that are often considered profane or offensive.. The designation "four-letter" arises from the observation that many (though not all) popular or slang terms related to excretory functions, sexual activity, genitalia, blasphemies, and terms linked to Hell or damnation are incidentally four-character monosyllables.
The words of A are the finite sequences of symbols from A, including words of length 1 containing a single symbol, words of length 2 with 2 symbols, and so on, even including the empty sequence with no symbols at all. The lexicographical order on the set of all these finite words orders the words as follows:
An f-fold n-ary de Bruijn sequence is an extension of the notion n-ary de Bruijn sequence, such that the sequence of the length contains every possible subsequence of the length n exactly f times. For example, for n = 2 {\displaystyle n=2} the cyclic sequences 11100010 and 11101000 are two-fold binary de Bruijn sequences.
Example: 01S 4 = 0101001010 is a palindrome. The palindromic density of the infinite Fibonacci word is thus 1/φ, where φ is the golden ratio: this is the largest possible value for aperiodic words. [3] In the infinite Fibonacci word, the ratio (number of letters)/(number of zeroes) is φ, as is the ratio of zeroes to ones. [4]
The voiced palatal lateral approximant is a type of consonantal sound used in some spoken languages.The symbol in the International Phonetic Alphabet that represents this sound is ʎ , a rotated lowercase letter y , and the equivalent X-SAMPA symbol is L.
Caesar shift: moving all the letters in a word or sentence some fixed number of positions down the alphabet; Techniques that involve semantics and the choosing of words. Anglish: a writing using exclusively words of Germanic origin; Auto-antonym: a word that contains opposite meanings; Autogram: a sentence that provide an inventory of its own ...