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Tie (typography)
The tie is a symbol in the shape of an arc similar to a large breve, used in Greek, phonetic alphabets, and Z notation. It can be used between two characters with spacing as punctuation, non-spacing as a diacritic, or (underneath) as a proofreading mark. It can be above or below, and reversed. Its forms are called tie, double breve, enotikon or papyrological hyphen, ligature tie, and undertie. Uses Cyrillic transliteration In the ALA-LC romanization for Russian, a tie symbol is placed over some combinations of roman letters that are represented by a single letter in the Cyrillic alphabet, e.g., T͡S for Ц and i͡a for я. This is not uniformly applied, however: some letters corresponding to common digraphs in English, such as sh for ш and kh for х do not employ the tie. In practice, the tie ligature is often omitted. Greek The enotikon (, ''henōtikón'', "uniter", from "a serving to unite or unify"), papyrological hyphen, or Greek hyphen was a low tie mark foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arc (geometry)
In mathematics, a curve (also called a curved line in older texts) is an object similar to a line, but that does not have to be straight. Intuitively, a curve may be thought of as the trace left by a moving point. This is the definition that appeared more than 2000 years ago in Euclid's ''Elements'': "The urvedline is the first species of quantity, which has only one dimension, namely length, without any width nor depth, and is nothing else than the flow or run of the point which will leave from its imaginary moving some vestige in length, exempt of any width." This definition of a curve has been formalized in modern mathematics as: ''A curve is the image of an interval to a topological space by a continuous function''. In some contexts, the function that defines the curve is called a ''parametrization'', and the curve is a parametric curve. In this article, these curves are sometimes called ''topological curves'' to distinguish them from more constrained curves suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
