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Global gridded bathymetric data sets: GEBCO_08 Grid — a global bathymetric grid with 30 arc-second spacing, generated by combining quality-controlled ship depth soundings with interpolation between sounding points guided by satellite-derived gravity data. GEBCO_2014 Grid — an update to the previously released GEBCO_08 Grid. [3]
The "staggered" Arakawa C-grid further separates evaluation of vector quantities compared to the Arakawa B-grid. e.g., instead of evaluating both east-west (u) and north-south (v) velocity components at the grid center, one might evaluate the u components at the centers of the left and right grid faces, and the v components at the centers of the upper and lower grid faces.
A piece consists of a 3 × 3 grid of squares, at least one of which must exist on the board. Only stones of one colour may be in the grid. There must be at least one stone on the eight squares around the central square. A piece can only be moved by the player whose stones are inside the grid. The 3 × 3 grid is termed the footprint of the piece ...
Generally this is a 2- or 3-dimensional regular grid. [3] The elements of the arrays are often referred to as cells. In each timestep, all array elements are updated. [2] Using neighboring array elements in a fixed pattern (the stencil), each cell's new value is computed.
Grundy number of a directed graph. [3]: GT56 Hamiltonian completion [3]: GT34 Hamiltonian path problem, directed and undirected. [2] [3]: GT37, GT38, GT39 Induced subgraph isomorphism problem; Graph intersection number [3]: GT59 Longest path problem [3]: ND29 Maximum bipartite subgraph or (especially with weighted edges) maximum cut.
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The exact cover problem is NP-complete [3] and is one of Karp's 21 NP-complete problems. [4] It is NP-complete even when each subset in S contains exactly three elements; this restricted problem is known as exact cover by 3-sets, often abbreviated X3C. [3] Knuth's Algorithm X is an algorithm that finds all solutions to an exact cover problem.
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