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The portion of the complex plane z=x+iy with real part R[z]>0.

A linkage which converts circular to linear motion using a hinged square.

A method for constructing magic squares of odd order, also called de la Loubere's method.

The mean square deviation of the best local fit straight line to a staircase cumulative spectral density over a normalized energy scale.

Squaring is the geometric construction, using only compass and straightedge, of a square which has the same area as a given geometric figure. Squaring is also called ...

The straight polyomino of order n is the n-polyomino in which all squares are placed along a line.

The subdiagonal of a square matrix is the set of elements directly under the elements comprising the diagonal. For example, in the following matrix, the diagonal elements are ...

The superdiagonal of a square matrix is the set of elements directly above the elements comprising the diagonal. For example, in the following matrix, the diagonal elements ...

The space join of a topological space X and a pair of points S^0, Sigma(X)=X*S^0.

The minimal polynomial S_n(x) whose roots are sums and differences of the square roots of the first n primes, ...