A two - degree -of -freedom gyroscope
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his death was unspecified
Karl W.T made important contributions in elliptical functions and the calculus of variations. He was also a lecturer and excelled many students like: Georg Canto, Ferdinand Frovenius, Felix Klein, Hermann Schwarz and many others.
The greatest mathematician of modern times is Carl Friedrich Gauss (1777-1855). He is also known as "Prince of Mathematicians", "greatest mathematician since antiquity" and "German Archimedes". According to Felix Klein, greatest mathematician of the nineteen century, "if we seek heroes of roughly equal stature in the history of our science, only two forerunners of Gauss can be considered to have been equally blessed by nature: Archimedes and Newton" (in "Development of Mathematics in the 19th Century", page 55).
In forth grade math students learn to solve problems using each of the four types of substraction: take-away, comparison, addative, and subset. John klein@nep.net
You're probably seeing FS, the initials of the coin's designer Felix Schlag. All 1988 nickels would have either a P, D, or S mint mark. Any that you find in change are worth only face value. The last time the US used a double mint mark was 1893, on coins struck in Carson City.