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Dimensions: height: 101.6 cm (40 in); width: 86.3 cm (33.9 in) Collection: University of Edinburgh ... Description=John Reid (also known as John Robertson) (1721-1807 ...
Robertson was born in 1879 in Seneca Township, Ontario, part of the historic Haldimand County, [2] as one of six children to parents John and Annie (née Brown) Robertson, both of Scottish heritage. [ 2 ] [ 3 ] [ 4 ] His father left the family to pursue the Gold Rush at the time, and died in 1886.
A Robertson screw, also known as a square screw [1] or Scrulox, [2] is a type of screw with a square-shaped socket in the screw head and a corresponding square protrusion on the tool. Both the tool and socket have a slight taper .
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The Friedmann–Lemaître–Robertson–Walker metric (FLRW; / ˈ f r iː d m ə n l ə ˈ m ɛ t r ə ... /) is a metric that describes a homogeneous, isotropic, expanding (or otherwise, contracting) universe that is path-connected, but not necessarily simply connected.
Midway through the performance, he declared, "40 acres and a mule / this is bigger than the music. They tried to rig the game / but you can’t fake influence.”
The Robertson graph is the unique (4,5)-cage graph and was discovered by Robertson in 1964. [4] As a cage graph, it is the smallest 4-regular graph with girth 5. It has chromatic number 3, chromatic index 5, diameter 3, radius 3 and is both 4-vertex-connected and 4-edge-connected. It has book thickness 3 and queue number 2. [5]