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  2. Combinatorics on words - Wikipedia

    en.wikipedia.org/wiki/Combinatorics_on_words

    An arithmetic progression is a sequence of numbers in which the difference between adjacent numbers remains constant. [ 1 ] When examining unavoidable patterns sesquipowers are also studied.

  3. Bakhshali manuscript - Wikipedia

    en.wikipedia.org/wiki/Bakhshali_manuscript

    The rules are algorithms and techniques for a variety of problems, such as systems of linear equations, quadratic equations, arithmetic progressions and arithmetico-geometric series, computing square roots approximately, dealing with negative numbers (profit and loss), measurement such as of the fineness of gold, etc. [8]

  4. Additive combinatorics - Wikipedia

    en.wikipedia.org/wiki/Additive_combinatorics

    then A and B are arithmetic progressions with the same difference. This illustrates the structures that are often studied in additive combinatorics: the combinatorial structure of A + B as compared to the algebraic structure of arithmetic progressions.

  5. Fermat's little theorem - Wikipedia

    en.wikipedia.org/wiki/Fermat's_little_theorem

    This is widely used in modular arithmetic, because this allows reducing modular exponentiation with large exponents to exponents smaller than n. Euler's theorem is used with n not prime in public-key cryptography , specifically in the RSA cryptosystem , typically in the following way: [ 10 ] if y = x e ( mod n ) , {\displaystyle y=x^{e}{\pmod ...

  6. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  7. Laws of Form - Wikipedia

    en.wikipedia.org/wiki/Laws_of_Form

    5.5.1.1 operator -operand duality. 5.5. ... Repeating this exercise for all possible assignments of the two ... The primary arithmetic and algebra are a minimalist ...

  8. Constant-recursive sequence - Wikipedia

    en.wikipedia.org/wiki/Constant-recursive_sequence

    2.2 Arithmetic progressions. 2.3 Geometric progressions. 2.4 Eventually periodic sequences. 2.5 Polynomial sequences. 2.6 Enumeration of words in a regular language.

  9. Harmonic series (mathematics) - Wikipedia

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

    [1] [2] Every term of the harmonic series after the first is the harmonic mean of the neighboring terms, so the terms form a harmonic progression; the phrases harmonic mean and harmonic progression likewise derive from music. [2] Beyond music, harmonic sequences have also had a certain popularity with architects.