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$2×2 $ real symmetric matrix full classification

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#optimization #determinant #quadratic-forms #positive-definite #positive-semidefinite
37
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signature of quadratic form and block matrix

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#linear-algebra #matrices #quadratic-forms #block-matrices
23
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Existence of solutions to system of quadratic equations

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#quadratic-forms
32
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Why is the centered moment for this formula so different?

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#linear-algebra #probability #variance #quadratic-forms
63
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How can I tell if these matrices are congruent?

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#linear-algebra #matrices #quadratic-forms #matrix-congruences
183
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Approaches to Solving Quadratic Diophantine Equations of the Form $x^2 + y^2 = k$

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#number-theory #elementary-number-theory #algebraic-number-theory #diophantine-equations #quadratic-forms
51
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In the perspective of tensors, are the matrices in linear transformations and quadratic forms fundamentally different?

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#linear-algebra #linear-transformations #tensors #quadratic-forms #covariance
42
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Minimizing quadratic cost function over an Euclidean ball

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#optimization #convex-optimization #nonlinear-optimization #quadratic-forms #karush-kuhn-tucker
145
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Are there any efficient methods to manually factor a quadratic in two variables?

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#quadratics #conic-sections #factoring #quadratic-forms
34
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Help in understanding why the antisymmetric part of the positive semi-definite quadratic form does not contribute?

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#linear-algebra #matrices #quadratic-forms #skew-symmetric-matrices
86
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Single constraint quadratic optimization dual form expression using the Schur complement

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#convex-optimization #quadratic-forms #non-convex-optimization #schur-complement
63
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What is the name of the middle matrix in a quadratic form $x'Ax$?

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#terminology #quadratic-forms #hessian-matrix
89
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A question related to the definition of quadratic form.

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#linear-algebra #quadratic-forms
51
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Quadratic forms in three variables

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#quadratic-forms
200
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On the elliptic curve $X^3 + 6\cdot 163^2 X - 7\cdot 163^3 = Y^2$ and others

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#number-theory #prime-numbers #conic-sections #elliptic-curves #quadratic-forms

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