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Full text

... via lattice points taking unit horizontal and unit vertical steps. In Church [2], it is shown that dn, k (0 < k < ft) is the number of lattice paths from (0, 0) to (2ft + 1 - k9 k) under the following two conditions: ...
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... 8. Jill has a cell phone but is only supposed to use it for emergencies and to check in with her parents. Somehow, many of her friends found out her number and call her frequently. She uses about 800 minutes every month. Of the two plans about, which plan is the best for Jill? Why? ...
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... Then F is the field of constructible numbers. Note that E ⊂ F. Moreover, F ∩ R = E. An element of F is called a constructible number. These numbers can be “constructed” by a process that will be described shortly. Conversely, let us start with a subset S of C such that S contains a non-zero complex ...
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Mathematics of radio engineering



The mathematics of radio engineering is the mathematical description by complex analysis of the electromagnetic theory applied to radio. Waves have been studied since ancient times and many different techniques have developed of which the most useful idea is the superposition principle which apply to radio waves. The Huygen's principle, which says that each wavefront creates an infinite number of new wavefronts that can be added, is the base for this analysis.
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