# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : infinite
 infinite   بیکران   bikarân (#)Fr.: infini   Unlimited or unmeasurable in extent of space, duration of time, etc. Math.: Not finite; an infinite quantity or magnitude; large beyond bound. Of a set, having elements that can be put into one-to-one correspondence with a subset that is not the given set.→ in- + → finite. infinite population   پرینش ِ بیکران   porineš-e bikarânFr.: population infinie   A → statistical population consisting of individuals or items which either possesses the infinite property through some limiting process or is non-enumerable. For example, the population of all → real numbers between 0 and 1 and the population of all → integers are examples of infinite population. In case of random sampling with replacement, any population is always infinite.→ infinite; → population. infinite series   سری ِ بیکران   seri-ye bikarân (#)Fr.: série infinie   A series with infinitely many terms, in other words a series that has no last term, such as 1 + 1/4 + 1/9 + 1/16 + · · · + 1/n2 + ... . The idea of infinite series is familiar from decimal expansions, for instance the expansion π = 3.14159265358979... can be written as π = 3 + 1/10 + 4/102 + 1/103 + 5/104 + 9/105 + 2/106 + 6/107 + 5/108 + 3/109 + 5/1010 + 8/1011 + ... , so π is an "infinite sum" of fractions. See also → finite series.→ infinite; → series. infinite set   هنگرد ِ بیکران   hangard-e bikarânFr.: ensemble infini   A set which can be put in a one-to-one correspondence with part of itself.→ infinite; → set. infinitesimal   بی‌کران‌خُرد   bikarânxordFr.: infinitésimal   General: Indefinitely or exceedingly small. Math.: A variable that approaches zero as a limit. A quantity decreasing indefinitely without actually becoming zero.Infinitesimal, coined by Ger. philosopher and mathematician Baron Gottfried Wilhelm von Leibniz (1646-1716) from N.L. infinitesim(us) "infinite in rank," from infinit(us), → infinite, + -esimus suffix of ordinal numerals + → -al.Bikarânxord, from bikarân "unbounded, unlimited, infinite," from bi- "without" + karân "boundary, side, end" (variants karâné, kenâr, from Mid.Pers. karân, karânak, kenâr "edge, limit, boundary," Av. karana- "side, boundary, end") + xord "minute, little, small" (from Mid.Pers. xvart, xôrt "small, insignificant;" Av. ādra- "weak, dependent;" Skt. ādhrá- "small, weak, poor," nādh "to be oppressed;" Gk. nothros "sluggish;" PIE base *nhdhro-). infinitesimal calculus   افماریک ِ بی‌کران‌خُرد   afmârik-e bikarânxordFr.: calcul infinitésimal   The body of rules and processes by means of which continuously varying magnitudes are dealt with in → calculus. The combined methods of mathematical analysis of → differential calculus and → integral calculus.