In most bingos with in-line scoring, the five number diagonal lines forming a big X through the main card counted.
This was implemented using offset holes in the shutter panel where the panel would slide up and sideways to release the correct balls.
A couple games also included some extra 3-in-line and 4-in-line diagonals, and a few games also had 6-in-line scoring on 3x6 (18 holes) or 4x6 cards (24 holes).
In engineering a diagonal brace is a beam used to cross brace a rectangular structure such as scaffolding to withstand sheer forces pusing into a rhombus; although called diagonal, due to practical considerations in practice diagonal braces are often not connected to the corners of the rectangle.
Diagonal pliers are wire-cutting pliers defined by the cutting edges of the jaws intersects the joint rivet at an angle or "on a diagonal", hence the name.
In general, the intersection number of the graph of a function with the diagonal may be computed using homology via the Lefschetz fixed point theorem; the self-intersection of the diagonal is the special case of the identity function.
en.wikipedia.org /wiki/Diagonal (816 words)
PlanetMath: diagonal matrix(Site not responding. Last check: 2007-10-13)
The identity matrix and zero matrix are diagonal matrices.
Diagonal matrices are also sometimes called quasi-scalar matrices [1].
This is version 9 of diagonalmatrix, born on 2003-06-28, modified 2006-05-25.
The first step in creating diagonal corners is to figure out the correct size of the base square or rectangle, that piece of fabric to which the triangular corner or corners is to be added.
As long as the base and diagonal corner square fabrics are not trimmed, the quilter has the option to repair any errors that may have been made.
The two examples shown both have the first diagonal corner facing the same directions, but the second corner is placed differently in the two examples and results in two very different quilt block units.
A Critique of the Diagonal Method(Site not responding. Last check: 2007-10-13)
The Tale of two Paradoxes emphasizes that the diagonal method is simply a convoluted form of the liar's paradox.
The goal was to show a few of the problems I had with the theory and to inject enough cynicism into the presentation of the diagonal method to allow students room for critical thinking.
The point of the diagonal method is to show the difference between discrete and continuous mathematics.
The idea that is often used is to call elements of the main diagonal
Create a 31 by 31 tridiagonal matrix A where the main diagonal elements are all "2" and all elements of the subdiagonal and superdiagonal elements are "1." Then solve the linear system
Since the matrix is tri-diagonal and diagonally dominant, there are other algorithms which can be used to compute the solution.
1 a : joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face b : passing through two nonadjacent edges of a polyhedron diagonal plane>
2 a : inclined obliquely from a reference line (as the vertical) diagonal grain> b : having diagonal markings or parts diagonal weave>
Learn more about "diagonal" and related topics at Britannica.com
Dan Flavin (American, 1933-), the alternate diagonals of March 2, 1964 (to Don Judd), 1964, red and yellow fluorescent light, 145 x 12 x 4 inches (368.3 x 30.5 x 10.2 cm), Museum of Contemporary Art, Chicago.
Also see arrangement, balance, bias, depth, diagonal, dimension, focal point, heuristic,
