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The zigzag product was introduced by Reingold, Vadhan & Wigderson (2000). When the zig-zag product was first introduced, it was used for the explicit construction of constant degree expanders and extractors. Later on, the zig-zag product was used in computational complexity theory to prove that symmetric logspace and logspace are equal ...
The MythBusters modified their corked bat rig to fire the baseball at much higher speeds. It fired the ball at a static bat with speeds over 200 mph (320 km/h), which is almost twice as fast as the fastest pitch ever recorded, which broke the bat. However, the ball remained intact. The MythBusters then fired the cannon at maximum power.
Houston Astros star Jose Altuve went yard against the Baltimore Orioles, but he truly hit it out of the park with his celebration that involved a young fan.. Altuve blasted a two-run homer to ...
A 2-metre carpenter's ruler with centimetre divisions Road sign warning for upcoming zigzag turn. A seismograph showing zigzag lines. The trace of a triangle wave or a sawtooth wave is a zigzag. Pinking shears are designed to cut cloth or paper with a zigzag edge, to lessen fraying. [2] In sewing, a zigzag stitch is a machine stitch in a zigzag ...
Therefore, a zig-zag product can also be used to construct families of expander graphs. If G is a ( n , d , λ 1 ) -graph and H is an ( m , d , λ 2 ) -graph, then the zig-zag product G H is a ( nm , d 2 , φ ( λ 1 , λ 2 )) -graph where φ has the following properties.
Bobby Lowe was the first MLB player to hit four home runs in a single game, doing so in 1894. In baseball, a home run occurs when the ball is hit in such a way that the batter is able to circle the bases and reach home safely in one play without any errors being committed by the defensive team in the process. In modern baseball, the feat is ...
The incidence posets of path graphs form examples of fences. A linear extension of a fence is called an alternating permutation; André's problem of counting the number of different linear extensions has been studied since the 19th century. [1] The solutions to this counting problem, the so-called Euler zigzag numbers or up/down numbers, are:
Line chart showing the population of the town of Pushkin, Saint Petersburg from 1800 to 2010, measured at various intervals. A line chart or line graph, also known as curve chart, [1] is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments. [2]