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Palindrome Tree TACOCAT Example
A palindrome ( /ˈpæl.ɪn.droʊm/) is a word, number, phrase, or other sequence of symbols that reads the same backwards as forwards, such as ''madam'' or ''racecar'', the date " 02/02/2020" and the sentence: "A man, a plan, a canal – Panama". The 19-letter Finnish word ''saippuakivikauppias'' (a soapstone vendor) is the longest single-word palindrome in everyday use, while the 12-letter term ''tattarrattat'' (from James Joyce in '' Ulysses'') is the longest in English. The word ''palindrome'' was introduced by English poet and writer Henry Peacham in 1638.Henry Peacham, ''The Truth of our Times Revealed out of One Mans Experience'', 1638p. 123 The concept of a palindrome can be dated to the 3rd-century BCE, although no examples survive. The earliest known examples are the 1st-century CE Latin acrostic word square, the Sator Square (which contains both word and sentence palindromes), and the 4th-century Greek Byzantine sentence palindrome '' nipson anomemata me monan op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambigram Palindrome ΝΙΨΟΝΑΝΟΜΗΜΑΤΑΜΗΜΟΝΑΝΟΨΙΝ (Wash Your Sins, Not Only Your Face, In Greek)
An ambigram is a calligraphic composition of glyphs (letters, numbers, symbols or other shapes) that can yield different meanings depending on the orientation of observation. Most ambigrams are visual palindromes that rely on some kind of symmetry, and they can often be interpreted as visual puns. The term was coined by Douglas Hofstadter in 1983–1984. Most often, ambigrams appear as visually symmetrical words. When flipped, they remain unchanged, or they mutate to reveal another Semantics, meaning. "Half-turn" ambigrams undergo a point reflection (180-degree rotational symmetry) and can be read upside down (for example, the word "swims"), while mirror ambigrams have axial symmetry and can be read through a reflective surface like a mirror. Many other types of ambigrams exist. Ambigrams can be constructed in various Written language, languages and alphabets, and the notion often extends to numbers and other symbols. It is a recent interdisciplinary concept, combining Visual arts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Table Canon
A Table canon is a retrograde and inverse canon meant to be placed on a table in between two musicians, who both read the same line of music in opposite directions. As both parts are included in each single line, a second line is not needed. Bach's ''The Musical Offering'' contains a table canon. See also *Mirror canon *Crab canon A crab canon (also known by the Latin form of the name, ''canon cancrizans''; as well as ''retrograde canon'', ''canon per recte et retro'' or ''canon per rectus et inversus'')Kennedy, Michael (ed.). 1994. "Canon". The Oxford Dictionary of Musi ... References Polyphonic form Canon (music) {{Music-theory-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pompeii
Pompeii ( ; ) was a city in what is now the municipality of Pompei, near Naples, in the Campania region of Italy. Along with Herculaneum, Stabiae, and Villa Boscoreale, many surrounding villas, the city was buried under of volcanic ash and pumice in the eruption of Mount Vesuvius in 79 AD. Largely preserved under the ash, Pompeii offers a unique snapshot of Culture of ancient Rome, Roman life, frozen at the moment it was buried, as well as insight into ancient urban planning. It was a wealthy town of 10,000 to 20,000 residents at the time it was destroyed. It hosted many fine public buildings and luxurious private houses with lavish decorations, furnishings and artworks, which were the main attractions for early excavators; subsequent excavations have found hundreds of private homes and businesses reflecting various architectural styles and social classes, as well as numerous public buildings. Organic remains, including wooden objects and human bodies, were interred in the as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Century Dictionary
''The Century Dictionary and Cyclopedia'' is one of the largest encyclopedic dictionaries of the English language. It was compared favorably with the ''Oxford English Dictionary,'' and frequently consulted for more factual information than would normally be the case for a dictionary. History The ''Century Dictionary'' is based on '' The Imperial Dictionary of the English Language'', edited by Rev. John Ogilvie (1797–1867) and published by W. G. Blackie and Co. of Scotland, 1847–1850, which in turn is an expansion of the 1841 second edition of Noah Webster's ''American Dictionary''. In 1882 The Century Company of New York bought the American rights to ''The Imperial Dictionary'' from Blackie and Son. The first edition of the ''Century Dictionary'' was published from 1889 to 1891 by The Century Company, and was described as "six volumes in twenty four". The first edition runs to 7,046 pages and features some 10,000 wood-engraved illustrations. It was edited by Sanskrit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sotadean Metre
The sotadean metre (pronounced: ) was a rhythmic pattern used by and named after the 3rd-century BC Greek poet Sotades. It is generally classified as a type of ionic metre, though in fact it is half ionic and half trochaic. It has several variations, but the usual pattern is this: : – – u u , – – u u , – u – u , – – An example from Petronius is: : :"three times I seized the terrible two-edged axe with my hand" A characteristic of the sotadean metre is its variability. Sometimes the trochaic rhythm (– u – u) is found in the first metron or the second; sometimes the ionic rhythm (– – u u) continues through the whole line. Usually each metron has exactly 6 morae, but there is also a less strict type of sotadean found in some writers in which a metron may have 7 morae, such as – u – –, – – – u, or – – u –. There is also frequent resolution (substitution of two shorts for a long syllable). The sotadean was used both in Greek and in Lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ionic Meter
The ionic (or Ionic) is a four-syllable Meter (poetry), metrical unit ''(metron)'' of syllable weight, light-light-heavy-heavy (u u – –) that occurs in ancient Greek poetry, ancient Greek and Latin poetry. According to Hephaestion (grammarian), Hephaestion it was known as the ''Ionicos'' because it was used by the Ionians of Asia Minor; and it was also known as the ''Persicos'' and was associated with Persian poetry. Like the choriamb, in Greek quantitative verse the ionic never appears in passages meant to be spoken rather than sung. "Ionics" may refer inclusively to poetry composed of the various metrical units of the same total quantitative length (six Mora (linguistics), morae) that may be used in combination with ionics proper: ionics, choriambs, and anaclasis (poetry), anaclasis. Equivalent forms exist in English poetry and in classical Persian poetry. Examples of ionics Pure examples of Ionic metrical structures occur in verse by Alcman (frg. 46 ''PMG'' = 34 D), Sappho ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sotades
Sotades (; 3rd century BC) was an Ancient Greek poet. Sotades was born in Maroneia, either the one in Thrace, or in Crete. He lived in Alexandria during the reign of Ptolemy II Philadelphus (285–246 BC). The city was at that time a remarkable center of learning, with a great deal of artistic and literary activity, including epic poetry and the Great Library. Only a few genuine fragments of his work have been preserved; those in Stobaeus are generally considered spurious. Ennius translated some poems of this kind, included in his book of satires under the name of Sota. He had a son named Apollonius. He has been credited with the invention of the palindrome. Sotades was the chief representative of the writers of obscene and even satirical poems, called "kinaidoi" (), composed in the Ionic dialect and in the metre named after him. One of his poems attacked Ptolemy II Philadelphus's marriage to his own sister Arsinoe II, from which came the infamous line: "You're sticking you ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sator Square At Oppède
Sator may refer to: * Šator, a mountain in Bosnia and Herzegovina * Sator (band), a Swedish band * ''Sator'' (film), a 2020 American supernatural horror film * ''Sator'' (lizard), a genus of lizard * Sator bean (''Parkia speciosa''), or stink bean, a bean with a strong smell popular in South East Asian cuisine * Sator Square The Sator Square (or Rotas-Sator Square or Templar Magic Square) is a two-dimensional acrostic class of word square containing a five-word Latin palindrome. The earliest squares were found at Roman-era sites, all in ROTAS-form (where the top l ... (or Rotas Square), a first-century word square containing a five-word Latin palindrome * Sator (the "Sower"), a minor Roman agricultural deity or cult title * Andrei Sator, a character from the film '' Tenet'' People with the surname * Klaus Sator (born 1956), German historian * László Sátor (born 1953), Hungarian racewalker * Ted Sator (born 1949), American ice hockey coach {{disambiguation, su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regular Language
In theoretical computer science and formal language theory, a regular language (also called a rational language) is a formal language that can be defined by a regular expression, in the strict sense in theoretical computer science (as opposed to many modern regular expression engines, which are Regular expression#Patterns for non-regular languages, augmented with features that allow the recognition of non-regular languages). Alternatively, a regular language can be defined as a language recognised by a finite automaton. The equivalence of regular expressions and finite automata is known as Kleene's theorem (after American mathematician Stephen Cole Kleene). In the Chomsky hierarchy, regular languages are the languages generated by regular grammar, Type-3 grammars. Formal definition The collection of regular languages over an Alphabet (formal languages), alphabet Σ is defined recursively as follows: * The empty language ∅ is a regular language. * For each ''a'' ∈ Σ (''a'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Context-free Language
In formal language theory, a context-free language (CFL), also called a Chomsky type-2 language, is a language generated by a context-free grammar (CFG). Context-free languages have many applications in programming languages, in particular, most arithmetic expressions are generated by context-free grammars. Background Context-free grammar Different context-free grammars can generate the same context-free language. Intrinsic properties of the language can be distinguished from extrinsic properties of a particular grammar by comparing multiple grammars that describe the language. Automata The set of all context-free languages is identical to the set of languages accepted by pushdown automata, which makes these languages amenable to parsing. Further, for a given CFG, there is a direct way to produce a pushdown automaton for the grammar (and thereby the corresponding language), though going the other way (producing a grammar given an automaton) is not as direct. Examples An e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alphabet
An alphabet is a standard set of letter (alphabet), letters written to represent particular sounds in a spoken language. Specifically, letters largely correspond to phonemes as the smallest sound segments that can distinguish one word from another in a given language. Not all writing systems represent language in this way: a syllabary assigns symbols to spoken syllables, while logographies assign symbols to words, morphemes, or other semantic units. The first letters were invented in Ancient Egypt to serve as an aid in writing Egyptian hieroglyphs; these are referred to as Egyptian uniliteral signs by lexicographers. This system was used until the 5th century AD, and fundamentally differed by adding pronunciation hints to existing hieroglyphs that had previously carried no pronunciation information. Later on, these phonemic symbols also became used to transcribe foreign words. The first fully phonemic script was the Proto-Sinaitic script, also descending from Egyptian hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automata Theory
Automata theory is the study of abstract machines and automata, as well as the computational problems that can be solved using them. It is a theory in theoretical computer science with close connections to cognitive science and mathematical logic. The word ''automata'' comes from the Greek word αὐτόματος, which means "self-acting, self-willed, self-moving". An automaton (automata in plural) is an abstract self-propelled computing device which follows a predetermined sequence of operations automatically. An automaton with a finite number of states is called a finite automaton (FA) or finite-state machine (FSM). The figure on the right illustrates a finite-state machine, which is a well-known type of automaton. This automaton consists of states (represented in the figure by circles) and transitions (represented by arrows). As the automaton sees a symbol of input, it makes a transition (or jump) to another state, according to its transition function, which takes the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
