position angle zâviye-ye neheš Fr.: angle de position The convention for measuring angles on the sky in astronomy (Abbreviated as PA). It is the direction of an imaginary arrow in the sky, measured from north through east: 0° = north, 90° = east, 180° = south, and so on to 359° and back to 0°. Applied to a binary system it is the direction of a secondary body or feature from a primary, measured in the system. . |
position switching degarbâni-ye neheš Fr.: permutation de position In single dish astronomy, an observing mode in which the telescope is moved between the object position and a user defined reference position. The aim is to eliminate unwanted signals in the baseline. → beam switching; → frequency switching. |
positional neheši (#) Fr.: de position, positionnel Relating to or determined by position. |
positional astronomy axtaršenâsi-ye neheši Fr.: astronomie de position The branch of astronomy that is used to determine the location of objects on the celestial sphere, as seen at a particular date, time, and location on the Earth. Same as → spherical astronomy. → positional; → astronomy. |
positional notation nemâdgân-e neheši Fr.: notation positionnelle A system of representing → numbers in which the → position of a → digit in a string of digits affects its value. The decimal system is a positional notation for expressing numbers. Same as → place-value notation and → positional number system. → positional; → notation. |
positional number system râžmân-e adadi-ye neheši Fr.: système de numération positionnel A → number system in which the value of each digit is determined by which place it appears in the full number. The lowest place value is the rightmost position, and each successive position to the left has a higher place value. In the → number system conversion, the rightmost position represents the "ones" column, the next position represents the "tens" column, the next position represents "hundreds", etc. The values of each position correspond to powers of the → base of the number system. For example, in the usual decimal number system, which uses base 10, the place values correspond to powers of 10. Same as → place-value notation and → positional notation. See also → number system conversion. → positional; → number; → system. |
positioning nehešdâd Fr.: positionnement The act or process of putting in a particular position or determining the psition of. |
preposition pišhel Fr.: préposition A word used with a noun or pronoun to mark its relation with another word. From L. praepositionem "a putting before," from praepositus, p.p. of praeponere "put before," from prae "before," → pre-, + ponere "put, set, place," → position. Pišhel, from piš-, "before," → pre-, + hel-, helidan, heštan "to place, put," → leap. |
proposition farâhel, gozâré (#) Fr.: proposition 1) The act of offering or suggesting something to be considered,
accepted, adopted, or done. Verbal noun of → propose. |
propositional gozaare#ay (#) Fr.: propositionnel Logic: Of, relating to, or in the form of a → proposition. → proposition; → -al. |
propositional constant pâyâ-ye gozaare#ay Fr.: constante propositionnelle Logic: A → propositional symbol that represents a → specific → proposition. → propositional; → constant. |
propositional logic guyik-e gozâre-yi, ~ gozaarehâ Fr.: logique propositionnelle A branch of logic that deals with the → truth values of logical statements (→ sentences, → propositions) and uses → logical connectives to build more complex → expressions. The distinctive feature of propositional logic is that it does not deal with logical relationships and properties that involve the parts of a statement smaller than the simple statements making it up. The propositions are evaluated as → true or → false. A more expressive system is provided by the → first-order logic. → proposition; → -al; → logic. |
propositional symbol nemâd-e gozâreyi Fr.: symbole propositionnel An upper case letter, e.g. "A," "B," "C," etc. representing a → proposition. Propositional symbols are divisible into two sorts: → propositional constants and → propositional variables. → propositional; → symbol. |
propositional variable vartande-ye gozâre-yi Fr.: variable propositionnel Logic: A → propositional symbol that represents any → proposition whatsoever. → propositional; → variable. |
superposition barhamneheš Fr.: superposition 1) The act of placing upon; the state of being placed upon. Barhamneheš, from bar- "on, upon, up" (Mid.Pers. abar; O.Pers. upariy "above; over, upon, according to;" Av. upairi "above, over," upairi.zəma- "located above the earth;" cf. Gk. hyper- "over, above;" L. super-; O.H.G. ubir "over;" PIE base *uper "over") + -ham- "together, with," → syn-, + neheš, → position. |
superposition principle parvaz-e barhamneheš Fr.: principe de superposition 1) Math.: The principle concerned with homogeneous and
non-homogeneous → linear differential equations,
stating that two or more solutions to a linear equation or set of linear equations can be added
together so that their sum is also a solution. → superposition; → principle. |
transposition tarâneheš Fr.: transposition Math.: A permutation of a set of elements that interchanges two elements and
leaves the remaining elements in their original positions.
For example, the swapping of 2 and 5 to take the list 123456 to 153426 is a transposition. |
true position neheš-e râstin Fr.: position vraie The coordinates of an object for a given date, with respect to the true equator and the true equinoxes for the instant of time in question. |