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A window screen (also known as insect screen, bug screen, fly screen, flywire, wire mesh, or window net) is designed to cover the opening of a window. It is usually a mesh made of metal, fibreglass , plastic wire, or other pieces of plastic and stretched in a frame of wood or metal.
Wrights is a brand of trim and other textiles for home sewing.It, and its subsidiary Lending Textile, operates using Wright, EZ Quilting, Boye and Bondex as brands. Since November 2017, it has been part of CSS Industries.
Blackout fabrics are most commonly found in hotel rooms as curtain linings or drapery fabrics, blocking much of the light that would otherwise enter through a window when the curtains are closed. For travelers, third shift workers, and parents of babies, blackout is an essential element in the bedroom .
Tapco Hurricane Screens are powder coated and made out of heavy-duty aluminum frames with stainless steel mesh used for the screening material. Also used are awning shutters, with a horizontal hinge above the opening being protected. Hurricane fabric coverings are a newer, relatively lower cost type of shutter.
Zetix is a fabric invented by Auxetics Technologies, Ltd., a UK company. Zetix is an auxetic material strong enough to absorb and disperse shockwaves from explosions without breaking. [ 1 ]
The generalized Poincaré conjecture is true topologically, but false smoothly in most dimensions. In fact, for odd dimensions, the smooth Poincaré conjecture is only true in dimensions 1, 3, 5 and 61. In even dimensions it is known that the smooth Poincaré conjecture is true in dimensions 2, 6, 12 and 56.
Statement of the conjecture [ edit ] If S {\displaystyle S} is a set of points in a vector space defined over a field F {\displaystyle F} , then the linearly independent subsets of S {\displaystyle S} form the independent sets of a matroid M {\displaystyle M} ; S {\displaystyle S} is said to be a representation of any matroid isomorphic to M ...
The honeycomb conjecture states that a regular hexagonal grid or honeycomb has the least total perimeter of any subdivision of the plane into regions of equal area. The conjecture was proven in 1999 by mathematician Thomas C. Hales .