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coordinate plane corresponding to the Fibonacci numbers (see Fig.3). The symmetric hyperbolic Fibonacci functions (19) and
(20) (Fig. 1) are the envelopes of the quasi-sine Fibonacci function .
Also the quasi-sine Fibonacci function has recursive properties similar to Fibonacci numbers [7].
Figure 3. The graph of the quasi-sine Fibonacci function
136 Stakhov/Rozin, The Golden Section, Fibonacci series and new hyperbolic models of Nature < URL >.
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