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  2. Dirichlet hyperbola method - Wikipedia

    en.wikipedia.org/wiki/Dirichlet_hyperbola_method

    Let a be a real number, not necessarily an integer, such that 1 < a < n, and let b = n/a. Then the lattice points can be split into three overlapping regions: one region is bounded by 1 ≤ x ≤ a and 1 ≤ y ≤ n / x , another region is bounded by 1 ≤ y ≤ b and 1 ≤ x ≤ n / y , and the third is bounded by 1 ≤ x ≤ a and 1 ≤ y ≤ b .

  3. Dice notation - Wikipedia

    en.wikipedia.org/wiki/Dice_notation

    7th Sea and Legend of the Five Rings use only 10-sided dice, so it omits the number of sides, using notation of the form , meaning "roll eight ten-sided dice, keep the highest six, and sum them."Although using a roll and keep system, Cortex Plus games all use roll all the dice of different sizes and keep two (normally the two best), although a ...

  4. Magic hexagon - Wikipedia

    en.wikipedia.org/wiki/Magic_hexagon

    A higher sum than 305 for order 5 hexagons is not possible. Order 5 hexagons, where the "X" are placeholders for order 3 hexagons, which complete the number sequence. The left one contains the hexagon with the sum 38 (numbers 1 to 19) and the right one, one of the 26 hexagons with the sum 0 (numbers −9 to 9).

  5. Sicherman dice - Wikipedia

    en.wikipedia.org/wiki/Sicherman_dice

    Here legal means that the coefficients are non-negative and sum to six, so that each die has six sides and every face has at least one spot. (That is, the generating function of each die must be a polynomial p(x) with positive coefficients, and with p(0) = 0 and p(1) = 6.)

  6. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    Graphs of y = b x for various bases b: base 10, base e, base 2, base ⁠ 1 / 2 ⁠. Each curve passes through the point (0, 1) because any nonzero number raised to the power of 0 is 1. At x = 1, the value of y equals the base because any number raised to the power of 1 is the number itself.

  7. Magic triangle (mathematics) - Wikipedia

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

    A magic triangle or perimeter magic triangle [1] is an arrangement of the integers from 1 to n on the sides of a triangle with the same number of integers on each side, called the order of the triangle, so that the sum of integers on each side is a constant, the magic sum of the triangle.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. 1 + 2 + 3 + 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    A summation method that is linear and stable cannot sum the series 1 + 2 + 3 + ⋯ to any finite value. (Stable means that adding a term at the beginning of the series increases the sum by the value of the added term.) This can be seen as follows. If + + + =, then adding 0 to both sides gives