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  2. Pietro Cataldi - Wikipedia

    en.wikipedia.org/wiki/Pietro_Cataldi

    Cataldi discovered the sixth and seventh perfect numbers by 1588. [1] His discovery of the 6th, that corresponding to p=17 in the formula M p =2 p -1, exploded a many-times repeated number-theoretical myth that the perfect numbers had units digits that invariably alternated between 6 and 8.

  3. Robert Recorde - Wikipedia

    en.wikipedia.org/wiki/Robert_Recorde

    With the publication of this book Recorde is credited with introducing algebra into the Island of Britain with a systematic notation. [7] [8] A medical work, The Urinal of Physick (1548), frequently reprinted. [9] Most of those works were written in the form of a catechism. [6]

  4. List of Mersenne primes and perfect numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_Mersenne_primes...

    Visualization of 6 as a perfect number Logarithmic graph of the number of digits of the largest known prime number by year, nearly all of which have been Mersenne primes. Mersenne primes and perfect numbers are two deeply interlinked types of natural numbers in number theory.

  5. History of mathematics - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematics

    The history of mathematics deals with the origin of discoveries in mathematics and the mathematical methods and notation of the past.Before the modern age and the worldwide spread of knowledge, written examples of new mathematical developments have come to light only in a few locales.

  6. Interval (mathematics) - Wikipedia

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

    The identity element of this algebra is the condensed interval [1, 1]. If interval [x, y] is not in one of the ideals, then it has multiplicative inverse [1/x, 1/y]. Endowed with the usual topology, the algebra of intervals forms a topological ring. The group of units of this ring consists of four quadrants determined by the axes, or ideals in ...

  7. History of algebra - Wikipedia

    en.wikipedia.org/wiki/History_of_algebra

    Rhetorical algebra, in which equations are written in full sentences. For example, the rhetorical form of + = is "The thing plus one equals two" or possibly "The thing plus 1 equals 2". Rhetorical algebra was first developed by the ancient Babylonians and remained dominant up to the 16th century.

  8. Category:Perfect intervals - Wikipedia

    en.wikipedia.org/wiki/Category:Perfect_intervals

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  9. Timeline of algebra - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_algebra

    Christopher Clavius publishes his Algebra: 1619: René Descartes discovers analytic geometry. (Pierre de Fermat claimed that he also discovered it independently.) 1631: Thomas Harriot in a posthumous publication is the first to use symbols < and > to indicate "less than" and "greater than", respectively. [26] 1637

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