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  2. Turtle graphics - Wikipedia

    en.wikipedia.org/wiki/Turtle_graphics

    Turtle graphics are often associated with the Logo programming language. [2] Seymour Papert added support for turtle graphics to Logo in the late 1960s to support his version of the turtle robot, a simple robot controlled from the user's workstation that is designed to carry out the drawing functions assigned to it using a small retractable pen set into or attached to the robot's body.

  3. Prime form - Wikipedia

    en.wikipedia.org/wiki/Prime_form

    The prime form E is not quite a holomorphic function on X × X, but is a section of a holomorphic line bundle over this space. Prime forms were introduced by Friedrich Schottky and Felix Klein. Prime forms can be used to construct meromorphic functions on X with given poles and zeros. If Σn i a i is a divisor linearly equivalent to 0, then ΠE ...

  4. Resource Description Framework - Wikipedia

    en.wikipedia.org/wiki/Resource_Description_Framework

    The Resource Description Framework (RDF) is a method to describe and exchange graph data. It was originally designed as a data model for metadata by the World Wide Web Consortium (W3C). It provides a variety of syntax notations and formats, of which the most widely used is Turtle (Terse RDF Triple Language).

  5. Ulam spiral - Wikipedia

    en.wikipedia.org/wiki/Ulam_spiral

    The prominent parallel line in the lower half of the figure corresponds to 4x 2 + 2x + 41 or, equivalently, to negative values of x. Conjecture F is concerned with polynomials of the form ax 2 + bx + c where a, b, and c are integers and a is positive.

  6. Logo (programming language) - Wikipedia

    en.wikipedia.org/wiki/Logo_(programming_language)

    Turtle graphics were added to the Logo language by Seymour Papert in the late 1960s to support Papert's version of the turtle robot, a simple robot controlled from the user's workstation that is designed to carry out the drawing functions assigned to it using a small retractable pen set into or attached to the robot's body.

  7. Matplotlib - Wikipedia

    en.wikipedia.org/wiki/Matplotlib

    Matplotlib (portmanteau of MATLAB, plot, and library [3]) is a plotting library for the Python programming language and its numerical mathematics extension NumPy.It provides an object-oriented API for embedding plots into applications using general-purpose GUI toolkits like Tkinter, wxPython, Qt, or GTK.

  8. Fibonacci prime - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_prime

    A prime divides if and only if p is congruent to ±1 modulo 5, and p divides + if and only if it is congruent to ±2 modulo 5. (For p = 5, F 5 = 5 so 5 divides F 5) . Fibonacci numbers that have a prime index p do not share any common divisors greater than 1 with the preceding Fibonacci numbers, due to the identity: [6]

  9. Prime-counting function - Wikipedia

    en.wikipedia.org/wiki/Prime-counting_function

    In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. [1] [2] It is denoted by π(x) (unrelated to the number π). A symmetric variant seen sometimes is π 0 (x), which is equal to π(x) − 1 ⁄ 2 if x is exactly a prime number, and equal to π(x) otherwise.