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  2. Fountas and Pinnell reading levels - Wikipedia

    en.wikipedia.org/wiki/Fountas_and_Pinnell...

    Small books containing a combination of text and illustrations are then provided to educators for each level. [3] While young children display a wide distribution of reading skills, each level is tentatively associated with a school grade. Some schools adopt target reading levels for their pupils.

  3. List of important publications in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_important...

    The first book on the systematic algebraic solutions of linear and quadratic equations by the Persian scholar Muhammad ibn Mūsā al-Khwārizmī. The book is considered to be the foundation of modern algebra and Islamic mathematics. [10] The word "algebra" itself is derived from the al-Jabr in the title of the book. [11]

  4. Injective function - Wikipedia

    en.wikipedia.org/wiki/Injective_function

    In mathematics, an injective function (also known as injection, or one-to-one function [1]) is a function f that maps distinct elements of its domain to distinct elements of its codomain; that is, x 1 ≠ x 2 implies f(x 1) ≠ f(x 2) (equivalently by contraposition, f(x 1) = f(x 2) implies x 1 = x 2).

  5. Firoozbakht's conjecture - Wikipedia

    en.wikipedia.org/wiki/Firoozbakht's_conjecture

    Prime gap function. In number theory, Firoozbakht's conjecture (or the Firoozbakht conjecture [1] [2]) is a conjecture about the distribution of prime numbers.It is named after the Iranian mathematician Farideh Firoozbakht who stated it in 1982.

  6. Textbook - Wikipedia

    en.wikipedia.org/wiki/Textbook

    Textbooks written in Pashto distributed to Afghan school children. A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions, but also of learners (who could be independent learners ...

  7. Function composition - Wikipedia

    en.wikipedia.org/wiki/Function_composition

    The reversed order of composition in the formula (f ∘ g) −1 = (g −1 ∘ f −1) applies for composition of relations using converse relations, and thus in group theory. These structures form dagger categories. The standard "foundation" for mathematics starts with sets and their elements. It is possible to start differently, by ...

  8. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    ASN.1 – Abstract Syntax Notation One, is an International Standards Organization data representation format used to achieve interoperability between platforms. NCBI uses ASN.1 for the storage and retrieval of data such as nucleotide and protein sequences, structures, genomes, and PubMed records.

  9. The Universal Book of Mathematics - Wikipedia

    en.wikipedia.org/wiki/The_Universal_Book_of...

    The first edition of the book had several errors which were fixed in later editions. Several famous scientists have sent in corrections to the author of the book. These include Warren Johnson and Freeman Dyson. [1]