Fr.: fenêtre rectangulaire
A → window function that is constant inside a specified interval.
1) Math.: The process of determining the length of a curve.
Verbal noun of → rectify.
Fr.: spectre rectifié
A spectrum after correction for detector's → baseline.
Agent noun of → rectify.
1) General: To make, put, or set right; to correct.
M.E. rectifien, from O.Fr. rectifier "to make straight," from L.L. rectificare "make right," from L. rectus "straight," cognate with Pers. râst, as below, → right + root of facere "to make, do, perform" (cf. Fr. faire, Sp. hacer), from PIE base *dhe- "to put, to do" (cf. Mod.Pers. dâdan "to give;" O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives; puts;" Skt. dadáti "puts, places;" Hitt. dai- "to place;" Gk. tithenai "to put, set, place;" Lith. deti "to put;" Czech diti, Pol. dziac', Rus. det' "to hide," delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do").
Râstidan, literally "to make straight, right," infinitive from râst cognate with L. rectus "straight," → right.
In a straight line; consisting of straight lines. → curvilinear
rectilinear propagation of light
tuceš-e râst-xatt-e nur
Fr.: propagation rectiligne de la lumière
The motion of light in the first approximation, as evidenced from the formation of shadows and other every day experience. However, → diffraction
Fr.: système rectilinéaire
Fr.: se reproduire périodiquement, revenir
To occur again, as an event, experience, etc.
Bâzâmadan "to come back, return," from bâz, → re-, + âmadan "to come, arrive, become" (present stem ây-); Av. ay- "to go, to come," aēiti "goes;" O.Pers. aitiy "goes;" Skt. e- "to come near," eti "arrival;" L. ire "to go;" Goth. iddja "went;" Lith. eiti "to go;" Rus. idti "to go."
1) An act or instance of recurring.
Verbal noun of → recur.
Fr.: relation de recurrence
A → sequence based on a → rule that gives the next → term as a → function of the previous term(s). For example, the sequence 3, 9, 21, 45,... can be represented by the recurrence relation un+1 = 2un + 3, where u1 = 3 and n ≥ 1.
Occurring or appearing again, especially repeatedly or periodically (Dictionary.com). → recurrence nova.
Verbal adj. from → recur.
novâ-ye bâzâyand, now-axtar-e ~
Fr.: nova récurrente
Fr.: récursion, récursivité
1) A running backward, return.
From L. recursionem (nominative recursio); → recurrent.
Bâzâneš, verbal noun of bâzâmadan, → recur.
1) Pertaining to or using a rule or procedure that can be applied repeatedly.
Adjective from → recursion.
Fr.: définition récursive
Math.: A definition of a function from which values of the same function can be calculated in a finite number of steps. In mathematical logic and computer science, a recursive definition is used to define an object in terms of itself. An example is the → factorial: n! = n*(n-1)!
1) bâzcarx kardan; 2) bâzcarx šodan
Fr.: 1) recycler; 2) se recycler
1) To treat or process used material so that it can be used again.
pulsâr-e bâzcarx šodé
Fr.: pulsar recyclé
A → pulsar of abnormally low magnetic field and short period. The short period suggests that the pulasr is young, while the low field suggests a very old pulsar. According to theoretical models, a pulsar at some point in its evolution stops functioning as a pulsar. If it resides in a binary system (→ binary pulsar), its magnetic field decays in the interval when the companion evolves and fills its → Roche lobe. The dead pulsar is eventually spun up to life when → mass transfer from the companion begins. The pulsar gains → angular momentum from the infalling gas and increases its spin rate as more gas falls onto it. → Millisecond pulsars that spin hundreds of times per second are thought to be the result of such a transfer (see, e.g., G. Srinivasan, 2010, New Astronomy Reviews 54, 93, and references therein).
That part of the electromagnetic spectrum, with a wavelength between 610 and 780 nm, that produces the impression of a variety of colors resembling that of blood.
M.E. red, from O.E. read (cf. Dan. rød, M.Du. root, Ger. rot), from PIE base *reudh- (cf. Av. raoidita- "red, reddish;" Skt. rudhirá- "red, bloody;" L. ruber "red;" Gk. erythros "red").
Sorx "red" (variants Tâleši sər, Kurd. sûr), from Mid.Pers. suxr "red;" O.Pers. θuxra-; Av. suxra- "red, of fire-color;" Ossetic syrx, surx "red;" cf. Skt. śukrá- "clear, pure, bright."
Fr.: grumeau rouge
A concentration, on the → horizontal branch, of → red giant stars that roughly have the same intrinsic brightness. These core → helium burning stars are the metal rich equivalents of the better known → horizontal branch stars. Theoretical models predict that their absolute luminosity only weakly depends on their age and chemical composition.