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The double-struck capital letter I, I, is a symbol sometimes used instead of Z for the ring of integers. In contrast, the lower case symbol i is used to refer to the ...

A polynomial in which the sum of subscripts is the same in each term.

The orthogonal decomposition of a matrix into lower trapezoidal matrices.

A normalizer of a nontrivial Sylow p-subgroup of a group G.

A polynomial x^n+a_(n-1)x^(n-1)+...+a_1x+a_0 in which the coefficient of the highest order term is 1.

Approximates the possible values of y in terms of x if sum_(i,j=0)^na_(ij)x^iy^j=0.

An element B of a ring is nilpotent if there exists a positive integer k for which B^k=0.

A system of parameter chain complexes used for multiplication on differential graded algebras up to homotopy.

An equation of the form P(x)=0, where P(x) is a polynomial.

A homogeneous polynomial in two or more variables.