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Each centered convex body of sufficiently high dimension has an "almost spherical" k-dimensional central section.

The Season 1 episode "Sacrifice" (2005) of the television crime drama NUMB3RS mentions econometrics.

sum_(i=1)^n((partialu)/(partialx_i))^2=1.

Ein(z) = int_0^z((1-e^(-t))dt)/t (1) = E_1(z)+lnz+gamma, (2) where gamma is the Euler-Mascheroni constant and E_1 is the En-function with n=1.

A mathematical statement of the equivalence of two quantities. The equality "A is equal to B" is written A=B.

The difference between a quantity and its estimated or measured quantity.

Let g(x)=(1-x^2)(1-k^2x^2). Then int_0^a(dx)/(sqrt(g(x)))+int_0^b(dx)/(sqrt(g(x)))=int_0^c(dx)/(sqrt(g(x))), where c=(bsqrt(g(a))+asqrt(g(b)))/(sqrt(1-k^2a^2b^2)).

An orthogonal projection of a cross onto a three-dimensional subspace. It is said to be normalized if the cross vectors are all of unit length.

One of the Eilenberg-Steenrod axioms which states that, if X is a space with subspaces A and U such that the set closure of A is contained in the interior of U, then the ...

The exists quantifier exists .