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  2. Patterns in nature - Wikipedia

    en.wikipedia.org/wiki/Patterns_in_nature

    Patterns in nature are visible regularities of form found in the natural world. These patterns recur in different contexts and can sometimes be modelled mathematically . Natural patterns include symmetries , trees , spirals , meanders , waves , foams , tessellations , cracks and stripes. [ 1 ]

  3. Summation - Wikipedia

    en.wikipedia.org/wiki/Summation

    Summations of infinite sequences are called series. They involve the concept of limit, and are not considered in this article. The summation of an explicit sequence is denoted as a succession of additions. For example, summation of [1, 2, 4, 2] is denoted 1 + 2 + 4 + 2, and results in 9, that is, 1 + 2 + 4 + 2 = 9.

  4. Summation (neurophysiology) - Wikipedia

    en.wikipedia.org/wiki/Summation_(neurophysiology)

    Basic ways that neurons can interact with each other when converting input to output. Summation, which includes both spatial summation and temporal summation, is the process that determines whether or not an action potential will be generated by the combined effects of excitatory and inhibitory signals, both from multiple simultaneous inputs (spatial summation), and from repeated inputs ...

  5. List of mathematical series - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_series

    This list of mathematical series contains formulae for finite and infinite sums. It can be used in conjunction with other tools for evaluating sums. Here, is taken to have the value

  6. Series (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Series_(mathematics)

    By nature, the definition of unconditional summability is insensitive to the order of the summation. When ∑ a n {\displaystyle \textstyle \sum a_{n}} is unconditionally summable, then the series remains convergent after any permutation σ : N → N {\displaystyle \sigma :\mathbb {N} \to \mathbb {N} } of the set N {\displaystyle \mathbb {N ...

  7. List of natural phenomena - Wikipedia

    en.wikipedia.org/wiki/List_of_natural_phenomena

    Examples include: sunrise, weather, fog, thunder, ... natural phenomena have been observed by a series of countless events as a feature created by nature.

  8. 100 Examples Of Ultimate Human Resilience In The Face Of ...

    www.aol.com/lifestyle/100-examples-ultimate...

    Mother Nature took no prisoners when she unleashed her wrath on Los Angeles at the beginning of 2025. Wildfires continue to rage in the area, and the death toll now stands at at least 27.

  9. Ramanujan summation - Wikipedia

    en.wikipedia.org/wiki/Ramanujan_summation

    Ramanujan summation is a technique invented by the mathematician Srinivasa Ramanujan for assigning a value to divergent infinite series.Although the Ramanujan summation of a divergent series is not a sum in the traditional sense, it has properties that make it mathematically useful in the study of divergent infinite series, for which conventional summation is undefined.