grid

  1. 7

    [Help] The number of possible k-sided polygons in an m by n grid of dots

    Hello. :spin: This is my first post, so sorry for the potential mistakes below. A grid of dots has the dimensions m by n, where m is greater than or equal to n. Pick k dots from this grid in such a way that they form a polygon with k sides. In other words, no three dots can be collinear...
  2. I

    power grid

    what is working of power grid?
  3. K

    Prime software? not gimps or prime grid.

    Hi everyone, I'm looking for a piece of software that tests for any prime I specifically input to it. Any kind of prime, not just mersenne primes. Does anyone have a link to a program like that? If so, it would be much appreciated. Many thanks, Kosxon
  4. L

    Integer coordinates in a sphere

    Given a sphere of integer radius R, how many integer coordinates (a, b, c) at most does it contain?
  5. L

    Paths between diagonal corners over a Cartesian grid

    Consider opposite diagonal corners of a chessboard. How many ways can one travel a minimum length between them by using edges of squares only? For a 3-d chessboard with edges of cubes? I intend to modify these solutions for use on a website.
  6. L

    Probability of a line intersecting Cartesian grid axes

    A line with arbitrary slope passes through a Cartesian grid. What is its chance of intersecting just one axis? More than one axis?
  7. R

    shading on the grid to satisfy inequalities?

    hi, i need help with the second part of this question (b).
  8. C

    Grid method with decimal...

    Hi, I need to obtain some explanations as I am teaching maths. I know how to use the grid method for multiplication. The decimal can be taken out, for example: x.x by xx.xx will be come xx by xxxx. Then if we count the decimal places (3) this can be put back in for example he above will...
  9. C

    Grid method with decimal...

    Hi, I need to obtain some explanations as I am teaching maths. I know how to use the grid method for multiplication. The decimal can be taken out, for example: x.x by xx.xx will become xx by xxxx. Then if we count the decimal places (3), this can be put back in. For example, the above will...
  10. E

    Grid algorithm help

    I need to find the grid intersection that nearest to the player. The player can be anywhere, "-4000, 99", "-9, -100" ext. The base start of the grid is "200, 200" and it increments by 400. Anyone know an algorithm to get the nearest intersection (X and Z)? Picture of the grid:
  11. B

    To create low density pbranes between a grid of machines aka weak entanglement

    For the first time I understand in a basic way enough to explain what I mean by mining gravity with a theoretical grid of ordinary electronics... http://mymathforum.com/computer-science/50447-p-not-equal-np-because-hopfield-boltzmann-energy-function-intractable.html Bose Condensate is when a...
  12. H

    Grid bounces

    I'm not quite sure where to post this. I hope this is the right place. And, since I'm not sure how to word this problem, I may not ask it right. I have been working on a problem with a line that bounces from one corner of a grid at a 45 degree angle. Corner to corner, it will ricochet off...
  13. A

    grid question

    Having a grid range n, G(n,n). And two types broken diagonals (45 degrees and 135 degrees) Thus each broken diagonal has n cells too. A diagonal type 1 can meet diagonals type 2 in two cells maximum, can be less. Let a diagonal type 1 beginning in cell (1,k1) and a diagonal type 2 beginning in...
  14. N

    A numercal grid for generating primers

    Here is my graphical method for generating primers this numerical grid is able to generate primers up to any number you want. In this method,there is steps to generate primers. these steps are in the following pdf file which give and example how to generate primers less than 150. download pdf...
  15. C

    Grid Based Poker odds question

    I'm developing a game that uses a grid based poker system and I need to figure out the odds of drawing a hand in order to balance the game properly. The game starts with 54 cards ( this includes jokers ) To start the game, you deal 9 cards in the center of a 5x5 grid. ( X = Grid Space ) ( Y =...
  16. K

    Complex grid question

    If there are five 5x5 grids with numbers 1 - 25 on them wherever you want, is it possible to, if numbers 1-25 are called at random, get a straight line (like bingo, including diagonals), within the first fifteen numbers called on at least one of the grids every time? Also I don't know what...
  17. C

    Quadrature Weights for Arbitrary Sampling Grid

    Hi, I'm an engineer not a mathematician. I want to know the appropriate methods (if any) for determining quadrature weights for an arbitrary (irregular) sampling grid. I am sampling a function over the unit sphere. I have seen one paper that hints at a method where each sampling position is...
  18. L

    Converting x,y coordinates on a grid

    Hi guys, I'm not sure if this is the correct section of the forum to ask this question, but hopefully you can all help me. I have a surface that is divided into four, even sections, ____ with coordinates ranging from 0.0 to 1.0...
  19. J

    Grid Formula Proof

    Hey all, I need some guidance on a problem I've been working on involving a grid formula. Please see the problem below: (i) Consider a n x n grid of uniform size. Guess a formula for the number of different squares (of varying size) and prove it. Click image for larger version Name: grid.png...
  20. T

    Hamiltonian grid graphs help!

    Hello there, I have been banging my head at this for a while and I just cannot decipher the notation. This is the paper. I am only looking at part 2: http://dl.dropbox.com/u/10598/Papers/CT ... 2-p1-7.pdf First of all, is this setup correct? More specific questions: What exactly is the...