cooriented

Checks relative orientation of cells

npm install cooriented
2 downloads in the last week
11 downloads in the last month

cooriented

Checks relative parity of two sequences. Can be used to evaluate the differential in simplicial homology.

Usage

Via npm:

npm install cooriented
console.log(require("cooriented")([0,1,2], [0,1,2])) // prints +1
console.log(require("cooriented")([0,1,2], [1,0,2])) // prints -1

require("cooriented")(a, b)

Computes the relative orientation of a vs b. This is done by evaluating the Vandermonde polynomials of degree n for a and b, then taking their quotient mod 3. If:

  • a.length !== b.length
  • OR the elements in a and b do not match
  • OR either a or b contains any repeated elements

Then this returns 0.

Credits

(c) 2013 Mikola Lysenko.

npm loves you