Kolmogorov and Aleksandrov in sevan monastery, Armenia, 1929
نویسندگان
چکیده
منابع مشابه
Ecosystems of Lake Sevan Basin-s Rivers in Armenia
Taking into account the importance of Lake Sevan and Lake Sevan basin’s rivers for Armenian economy, the main goals of our investigations were the documentation of water quality and the biodiversity of invertebrates developed in Lake Sevan basin’s rivers and selected tributaries. Moderately satisfied ecological condition for the biodiversity of Lake Sevan basin’s rivers has been established, an...
متن کاملStudies on heavy metal accumulation in aquatic macrophytes from Sevan (Armenia) and Carambolim (India) lake systems.
Aquatic macrophytes are unchangeable biological filters and they carry out purification of the water bodies by accumulating dissolved metals and toxins in their tissue. In view of their potential to entrap several toxic heavy metals, 45 macrophytes belonging to 8 families collected from two different physiographic locations (36 from Sevan Lake, Armenia; 9 from Carambolim Lake, Old Goa, India) w...
متن کاملAssessment of mutagenicity of water from Lake Sevan, Armenia with application of Tradescantia (clone 02).
For many decades water resources in Armenia have been affected by anthropogenic activity, therefore, a regular bioindication of genotoxic effects of the water bodies is desirable. The genotoxicity of water samples collected from different parts of Lake Sevan were assessed by means of Trad-SHM (stamen hair mutation) assay using Tradescantia (clone 02). Here we report a significant increase in th...
متن کامل3 Aleksandrov Surfaces and Hyperbolicity
Aleksandrov surfaces are a generalization of two-dimensional Rie-mannian manifolds, and it is known that every open simply connected Alek-sandrov surface is conformally equivalent either to the unit disc (hyperbolic case) or to the plane (parabolic case). We prove a criterion for hyperbolicity of Aleksandrov surfaces which have nice tilings and where negative curvature dominates. We then apply ...
متن کاملNymphaea alba (Nymphaeaceae) in Armenia
In Armenia, Nymphaea alba only occurs in a small area NW of Stepanavan. It is restricted to small lakes with a minimum depth of c. 2–3 m because in shallower lakes it may be out-competed by Typha or Schoenoplectus species.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Mathematical Intelligencer
سال: 2004
ISSN: 0343-6993
DOI: 10.1007/bf02985651