Countable or Uncountable…That is the question!
... • We have shown that the union of two countable sets is also countable so (Q+ υ {0}) υ Q- = Q is countable ...
... • We have shown that the union of two countable sets is also countable so (Q+ υ {0}) υ Q- = Q is countable ...
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... Finally, we note that the above ideas may be carried out to extend general second-order recurring sequences to continuous functions, as indicated in Section 2. However, because of increased complexity, we do not state the more general results here. ...
... Finally, we note that the above ideas may be carried out to extend general second-order recurring sequences to continuous functions, as indicated in Section 2. However, because of increased complexity, we do not state the more general results here. ...
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.