A lack of → order. See → entropy.
Birâyegi, from birâyé, → disordered, + -(g)i noun suffix.
Lacking → order.
→ disorder + -ed.
first-order differential equation
hamugeš-e degarsâne-yi-ye râye-ye naxost
Fr.: équation différentielle du premier ordre
A → differential equation containing only the first → derivative. For example, dy/dx = 3x and 2y(dy/dx) + 3x = 5.
→ first; → order; → differential; → equation.
first-order logic (FOL)
guyik-e farâsani-ye râye-ye naxost, ~ farâsanhâ-ye ~ ~
Fr.: logique des prédicats du premier ordre
A system of → formal logic that is an extension of → propositional logic. It is also known as → first-order predicate calculus and → predicate logic. FOL eliminates deficiencies of propositional logic by: representing → objects (their properties, relations and statements about them), introducing → variables, and introducing → quantifiers.
first-order partial derivative
vâxane-ye pâri-ye râye-ye naxost
Fr.: dérivée partielle du premier degré
For a → function with several → variables, the derivative, done only once, with respect to one of the variables. For example ∂u/∂x for u = u(x,y).
→ first; → order; → partial; → derivative.
first-order predicate calculus
afmârik-e farâsani-ye râye-ye naxost
Fr.: cacul des prédicats du premier ordre
Same as → first-order logic.
binâb-e râye-ye naxost
Fr.: spectre du premier ordre
An optical spectrum, produced by a diffraction grating, in which the difference in path length of light from adjacent slits is one wavelength.
Fr.: ordre d'interférence
→ interference; → order.
1) râyé; 2) râyândan
Fr.: 1) ordre; 2) ordonner
1a) General: The way in which several items are arranged, as an indication
of their relative importance or size or when each will be dealt with.
From O.Fr. ordre, from earlier ordene, from L. ordinem (nominative ordo) "row, rank, arrangement."
Râyé, noun related to râyânidan "to regulate, set in order," from Mid.Pers. râyânīdan "to arrange, organize," from rây- (Mod.Pers. ârây-, ârâyeš, ârâyidan "to arrange, adorn"), ârây-, ârâstan "to arrange, adorn;" O.Pers. rād- "to prepare," rās- "to be right, straight, true," rāsta- "straight, true" (Mod.Pers. râst "straight, true"); Av. rāz- "to direct, put in line, set," razan- "order;" Gk. oregein "to stretch out;" L. regere "to lead straight, guide, rule," p.p. rectus "right, straight;" Skt. rji- "to make straight or right, arrange, decorate;" PIE base *reg- "move in a straight line;" see also → direct.
order of a graph
Fr.: ordre de graphe
order of a tensor
Fr.: ordre de tenseur
The maximum number of the indices (→ index) of a tensor.
order of interference
Fr.: ordre d'interfrérence
A whole number which characterizes a particular position of an interference fringe according to whether there is interference arising from one, two, three, etc. wavelength difference of path. Same as → interference order
→ order; → interference.
order of magnitude
Fr.: ordre de grandeur
Value of a number or of a physical quantity given roughly, usually expressed as a power of 10. Thus, 2.5 x 105 and 6.4 x 105 are of the same order of magnitude, and 2 x 107 is 2 orders of magnitude greater than either.
Characterized by → order; arranged according to a rule. → ordered tree.
→ order + -ed.
Fr.: arbre ordonné
In → graph theory, a → tree in which the → children of each → vertex are ordered.
guyik-e râye-ye dovom
Fr.: logique du seconde ordre
An n extension of → first-order logic that quantifies not only → variables that range over → individuals, but also quantifies over → relations.
Fr.: ensemble bien ordonné
A set in which every → nonempty → subset has a minimum element.