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The theory and applications of Laplace transforms and other integral transforms.

The statistical index P_P=(sump_nq_n)/(sump_0q_n), where p_n is the price per unit in period n and q_n is the quantity produced in period n.

A papal cross is a cross having three crossbars. A schematic polyomino version of a papal cross is illustrated above.

For a parabola oriented vertically and opening upwards, the vertex is the point where the curve reaches a minimum.

Let A be a finite-dimensional power-associative algebra, then A is the vector space direct sum A=A_(11)+A_(10)+A_(01)+A_(00), where A_(ij), with i,j=0,1 is the subspace of A ...

A 15-sided polygon, sometimes also called the pentakaidecagon. For a regular pentadecagon with side length 1, the inradius r, circumradius R, and area A are r = ...

The pentagrammic dipyramid is the dual polyhedron of the pentagrammic prism U_(78).

One petabyte is 10^(15) bytes. Unfortunately, the term is sometimes also used to mean 2^(50)=1024^5 bytes. However, the latter usage is deprecated, and the term pebibyte is ...

The motion along a phase curve as a function of time (Tabor 1989, p. 14).

The addition of two quantities, i.e., a plus b. The operation is denoted a+b, and the symbol + is called the plus sign. Floating-point addition is sometimes denoted direct ...