An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : empty
empty
  تهی   
tohi (#)

Fr.: vide   

Containing nothing; having none of the usual or appropriate contents (Dictionary.com).

M.E., from O.E. æmettig "vacant, not occupied," from æmetta "a leisure," from æ "not" + -metta, from motan "to have."

Tohi "empty," → void.

empty graph
  نگاره‌ی ِ تهی   
negâre-ye tohi

Fr.: graphe vide   

In → graph theory, a graph with any number of → vertices which do not have → edges.

empty; → graph.

empty set
  هنگرد ِ تهی   
hangard-e tohi

Fr.: ensemble vide   

A set containing no → elements.

empty; → set.

empty Universe
  گیتی ِ تهی   
giti-ye tohi

Fr.: Univers vide   

A → cosmological model based on → Einstein's field equations in which the → Universe is devoid of → matter and → radiation. There are two types of empty Universes: the → de Sitter Universe and the → Milne Universe.

empty; → Universe.

nonempty
  ناتهی   
nâtohi (#)

Fr.: non vide   

Describing something that is partially or totally occupied.

non; → empty.

nonempty set
  هنگرد ِ ناتهی   
hangard-e nâtohi

Fr.: ensemble non vide   

A set containing at least → one → element.

nonempty; → set.