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The Johnson solids are named after American mathematician Norman Johnson (1930–2017), who published a list of 92 such polyhedra in 1966. His conjecture that the list was complete and no other examples existed was proven by Russian-Israeli mathematician Victor Zalgaller (1920–2020) in 1969.
ESCO Group LLC is a manufacturer of engineered metal wear parts and components for industrial applications—including mining and construction. Since 1913, the company, which is a division of Weir Group PLC, has been headquartered in Portland, Oregon , USA.
A Johnson solid is a convex polyhedron whose faces are all regular polygons. [2] Here, a polyhedron is said to be convex if the shortest path between any two of its vertices lies either within its interior or on its boundary, none of its faces are coplanar (meaning they do not share the same plane, and do not "lie flat"), and none of its edges are colinear (meaning they are not segments of the ...
Engelhard Corporation was an American Fortune 500 company headquartered in Iselin, New Jersey, United States. It is credited with developing the first production catalytic converter . In 2006, the German chemical manufacturer BASF bought Engelhard for US$5 billion.
Formerly headquartered in Houston, Texas, the company was founded as National Components Inc. in 1984 by Johnie Schulte and reincorporated in Delaware in 1991. [3] [8] In 1994, the company closed an agreement to purchase substantially all the assets and business of Ellis Building Components, Inc. located in Tallapoosa, Ga. [9] In 1998, they completed the acquisition of MetalBuilding Components ...
Special Metals Corporation (SMC) is an American supplier of special refractory alloys and is headquartered in New Hartford, New York, United States. The company has operations in Perth, Western Australia ; Albury, New South Wales ; Huntington , West Virginia ; Dunkirk , New York ; Burnaugh , Kentucky ; Elkhart , Indiana and Hereford , England .
As a registered nonprofit, Solid Rock Christian Ministries for years had been exempt from paying property taxes. That status appears to have changed in 2017 — unbeknownst to the church ...
Midland PA Works. ATI Inc. (previously Allegheny Technologies Incorporated) is an American producer of specialty materials headquartered in Dallas, Texas.ATI produces metals including titanium and titanium alloys, nickel-based alloys and superalloys, stainless and specialty steels, zirconium, hafnium, and niobium, tungsten materials, forgings and castings.