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November 23, 2019 ## 1, 1, 2, 3: It's Fibonacci Day!

Today's date, November 23, can be represented as 11/23, or 1, 1, 2, 3—the beginning of the Fibonacci sequence of numbers. Likewise, as the leaves on the Queen Victoria agave in today's image spiral out from the center, they also express the Fibonacci sequence. This unique sequence of numbers was introduced to Europe in 1202 by the Italian mathematician Leonardo of Pisa (posthumously named Fibonacci) in his revolutionary work, the 'Liber Abaci.' The book begins by describing the Hindu-Arabic numeral system or 'Modus Indorum’—0 1 2 3 4 5 6 7 8 9—and shows how its application could simplify trade and make calculations faster and easier (most of Europe at this time used Roman numerals).

In the third section of his book, Fibonacci goes on to describe various mathematical problems, including a thought experiment about increasing rabbit populations that results in the Fibonacci sequence. The sequence is determined by adding the previous two numbers together to establish the next number: 1, 1, 2, 3, 5, 8, 13, 21, 34, etc. Since then, mathematicians, scientists, and artists have been studying and applying the Fibonacci sequence and the Fibonacci numbers that make it up. While Fibonacci gets the credit for describing the number sequence, he wasn't the first to discover it. Research published in 1985 posits that ancient Indian mathematicians had been aware of and wrote about the sequence more than a thousand years before Fibonacci's work.

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?Without mathematics, there's nothing you can do. Everything around you is mathematics. Everything around you is numbers.?
Shakuntala Devi

1. ## Fibonacci number - Wikipedia

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Nov 02, 2019 · Fibonacci numbers are strongly related to the golden ratio: Binet's formula expresses the n th Fibonacci number in terms of n and the golden ratio, and implies that the ratio of two consecutive Fibonacci numbers tends to the golden ratio as n increases.. Fibonacci numbers are named after Italian mathematician Leonardo of Pisa, later known as Fibonacci. ...

2. ## Fibonacci Numbers Lines Definition and Uses

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Jul 11, 2019 · Key Takeaways Fibonacci numbers and lines are created by ratios found in Fibonacci's sequence. Common Fibonacci numbers in financial markets are 0.236, 0.382, 0.618, 1.618, 2.618, 4.236. While not officially Fibonacci numbers, may traders also use 0.5, 1.0, and 2.0. The numbers reflect how far ...

3. Fibonacci series
名詞
Fibonacci numbers (復數名詞)
1. a series of numbers in which each number (Fibonacci number) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.
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更多信息Fibonacci series
What are the first 10 Fibonacci numbers?
The first ten numbers in the Fibonacci Sequence are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34. Fibonacci numbers also appear in many aspects of nature such as the arrangement of leaves on a stem and the branching of trees.
What is the sequence of Fibonacci numbers?
The Fibonacci sequence is a sequence of numbers in which each successive number in the sequence is obtained by adding the two previous numbers in the sequence. The sequence is named after the Italian mathematician Fibonacci. The sequence starts with zero and one, and proceeds forth as 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 and so on.
www.techopedia.com/definition/15823/fibonacci-sequence
Why are Fibonacci numbers interesting?
These numbers have become important pivotal points when analyzing retracement of a trend. The Fibonacci numbers are the crucial numbers for the Elliott wave analysis. They play a major role in analyzing the way you think and how your emotions play a role in your investment decisions.
How to determine the largest Fibonacci number?
If you need to find the largest Fibonacci number that is less than a certain number N, you can also use the rounding calculation: phi^n / sqrt(5) < N which gives you: n < log(N x sqrt(5)) / log(phi) Then you can calculate the right hand side part for your chosen N, round it down to find n, and calculate the corresponding Fibonacci number with:
stackoverflow.com/questions/13492807/how-to-determin…
5. ## Fibonacci Sequence - Math Is Fun

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Aug 09, 2010 · It takes longer to get good values, but it shows that not just the Fibonacci Sequence can do this! Using The Golden Ratio to Calculate Fibonacci Numbers. And even more surprising is that we can calculate any Fibonacci Number using the Golden Ratio: The answer always comes out as a whole number, exactly equal to the addition of the previous two ...

6. ## Fibonacci Series in Java: How to display first n numbers ...

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Jun 12, 2019 · The Fibonacci Sequence is a peculiar series of numbers named after Italian mathematician, known as Fibonacci. Starting with 0 and 1, each new number in the Fibonacci Series is simply the sum of the two before it.

7. ## How to Calculate the Fibonacci Sequence (with Pictures ...

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Mar 29, 2019 · How to Calculate the Fibonacci Sequence - Using a Table Set up a table with two columns. Enter the sequence of terms in the left column. Enter 1 in the first row of the right-hand column. Add the first term (1) and 0. Add the first term (1) and the …

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8. ## Celebrate numbers, patterns, and trippy visuals on ...

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Nov 23, 2019 · It's a big day for number nerds. The date Nov. 23 – really 11/23, since formatting makes a difference here – marks Fibonacci Day, a time when people on the internet take a …