Flat vector cartoon illustration, clipart. multiple rings stock illustrations Hand with fashion friendship summer bracelets and rings isolated... Piercing jewelry. Realistic metal nose rings. 3D ...

Penile strangulation by multiple constricting metallic rings may lead to penile gangrene/necrosis/urethral injury/fistula and erectile dysfunction. Steel ball bearings encircling penis that cannot be ...

Abstract: A number of recent surveys for gravitational lenses have found examples of double Einstein rings. Here, we analytically investigate the occurrence of multiple Einstein rings. We prove, under ...