= Negative definiteness
{wiki=Negative_definiteness}
Negative definiteness is a concept from linear algebra and functional analysis, particularly in the context of matrices and quadratic forms. A matrix \\( A \\) is said to be negative definite if it satisfies the following conditions: 1. **Square Matrix**: The matrix \\( A \\) is a square matrix (i.e., it has the same number of rows and columns). 2. **Negative Eigenvalues**: All eigenvalues of the matrix \\( A \\) are negative.
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