A circumscribed Universe

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Circumscribed Choroidal Hemangioma

Circumscribed choroidal hemangioma is an uncommon, benign vascular tumor manifesting as an orange-red mass in the posterior pole of the eye. Serous retinal detachment accounts for decreased vision in most patients. Diagnosis of this tumor is challenging with many patients initially misdiagnosed with choroidal melanoma or metastasis. Several ancillary tests such as ultrasonography, fluorescein a...

متن کامل

A measles epidemic in a circumscribed community.

A measles outbreak of 151 cases in a circumscribed rural community is documented. Attention is drawn to accuracy of vaccination documentation and the factors influencing uptake. The efficacy of the vaccine in the population of school children is estimated (both within the community at large and within the home of an affected person). A failure rate of 5-6 per cent was found.

متن کامل

Circumscribed sphere of a convex polyhedron

Suppose that K is a convex polyhedron in the n-dimensional Euclidean space R. Suppose that the extreme points of K are P1, P2, . . . , Pm ( m ≥ n + 1). If P is an arbitrary interior point of K, then there exist vertices Pi1 , Pi2 , . . . , Pin+1 of K and a point Q of R n and a positive number r > 0 for which ||Pik − Q|| = r for 1 ≤ k ≤ n + 1 , ||Pj − Q|| ≤ r for 1 ≤ j ≤ m and P is an interior p...

متن کامل

Circumscribed acral hypokeratosis.

BACKGROUND Circumscribed acral hypokeratosis (CAH) is an idiopathic condition that typically presents as an acquired, solitary, asymptomatic, well-defined, depressed, flat-based deformity, with a slightly raised border on the palm or, rarely, the sole. Histologically, the lesional epidermis is depressed with a characteristic, abrupt, hyperkeratotic, slightly-raised ridge at the transition from ...

متن کامل

A Characterization Result for Circumscribed NormalLogic

Circumscription has been perceived as an elegant mathematical technique for modeling nonmonotonic and commonsense reasoning, but diicult to apply in practice due to the use of second-order formulas. One proposal for dealing with the computational problems is to identify classes of rst-order formulas whose circumscription can be shown to be equivalent to a rst-order formula. In previous work, we...

متن کامل

ذخیره 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: Nature

سال: 1998

ISSN: 0028-0836,1476-4687

DOI: 10.1038/32053