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Markushevich's masterly three-volume "Theory of Functions of a Complex Variable
books on notations
quiet restraint
Ernest Flagg (1857-1947) was most famous for his skyscrapers
Helicopter Theory Markushevich's masterly three-volume "Theory ofThe history of the helicopter may be traced back to the Chinese flying top (c. 400 B. C.) and to the work of Leonardo da Vinci, who sketched designs for a vertical flight machine utilizing a screw type propeller. In the late nineteenth century, Thomas Edison experimented with helicopter models, realizing that no such machine would be able to fly until the development of a sufficiently lightweight engine. When the internal combustion gasoline engine
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