List questions from quadratic-forms

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List Question

How to take the gradient of the quadratic form?

Matrix of a quadratic form?

The quadratic form $x^2 + ny^2$ via prime factors

Reference request for quadratic form diagonalization

Completing squares by symplectic transformations

Matrix Equation with Quadratic form

Hessian matrix of a quadratic form

Centre of a quadric

solution count of quadratic form congruences

Solution count of quadratic form congruence over $\Bbb Z / 8 \Bbb Z$

two non-degenerate quadratic forms on $GF(2)^2r$

Is symmetry a necessary condition for positive (or negative) definiteness?

What numbers are integrally represented by $4 x^2 + 2 x y + 7 y^2 - z^3$

How to deal with translations, with change of coordinates for Quadratic Forms: $x^TAx=k$ ?

How do you construct a lattice from its basis or its Gram Matrix?

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