[{"n": "Norm (mathematics)", "u": "/e/algebra/norm-mathematics/", "s": "A function measuring vector length in a normed space."}, {"n": "Normal subgroup", "u": "/e/algebra/normal-subgroup/", "s": "Subgroup invariant under conjugation by group elements."}, {"n": "Polynomial", "u": "/e/algebra/polynomial/", "s": "A mathematical expression of variables and coefficients using addition and multiplication."}, {"n": "Polynomial ring", "u": "/e/algebra/polynomial-ring/", "s": "Ring formed from polynomials with coefficients in another ring."}, {"n": "Product (category theory)", "u": "/e/algebra/product-category-theory/", "s": "Universal construction generalizing Cartesian product across categories."}, {"n": "Product (mathematics)", "u": "/e/algebra/product-mathematics/", "s": "The result of multiplication, central to arithmetic and algebra."}, {"n": "Projection (linear algebra)", "u": "/e/algebra/projection-linear-algebra/", "s": "A linear operator that is idempotent, generalizing graphical projection."}, {"n": "Quadratic equation", "u": "/e/algebra/quadratic-equation/", "s": "A second-degree polynomial equation with at most two solutions."}, {"n": "Quadratic form", "u": "/e/algebra/quadratic-form/", "s": "A homogeneous polynomial of degree two in several variables."}, {"n": "Quadratic formula", "u": "/e/algebra/quadratic-formula/", "s": "Closed-form expression for solving quadratic equations."}, {"n": "Quadratic function", "u": "/e/algebra/quadratic-function/", "s": "A polynomial function of degree two, graphed as a parabola."}, {"n": "Quaternion", "u": "/e/algebra/quaternion/", "s": "Four-dimensional number system for three-dimensional rotations."}, {"n": "Rank (linear algebra)", "u": "/e/algebra/rank-linear-algebra/", "s": "Rank measures the dimension of a matrix's column or row space."}, {"n": "Rank–nullity theorem", "u": "/e/algebra/rank-nullity-theorem/", "s": "Domain dimension equals rank plus nullity."}, {"n": "Rational function", "u": "/e/algebra/rational-function/", "s": "Ratio of two polynomial functions, fundamental in algebra and analysis."}, {"n": "Real-valued function", "u": "/e/algebra/real-valued-function/", "s": "A function that assigns a real number to each domain element."}, {"n": "Representation theory", "u": "/e/algebra/representation-theory/", "s": "Studies algebraic structures via linear transformations."}, {"n": "Resultant", "u": "/e/algebra/resultant/", "s": "Polynomial expression indicating common roots of two polynomials."}, {"n": "Ring (mathematics)", "u": "/e/algebra/ring-mathematics/", "s": "Algebraic structure with two binary operations, generalizing integer arithmetic."}, {"n": "Ring theory", "u": "/e/algebra/ring-theory/", "s": "Study of algebraic structures with addition and multiplication."}]