Abstract
Notice that \(a_{ij}=-a_{ji}\), \(i, j=0,1,\ldots , 2012\), i.e., the matrix \(A=(a_{ij})_{i, j=0}^{2012}\) is skew-symmetric, \(A^\text {T}=-A.\) Therefore,
whence \(\det \, A=0\).
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Brayman, V., Kukush, A. (2017). 2012. In: Undergraduate Mathematics Competitions (1995–2016). Problem Books in Mathematics. Springer, Cham. https://doi.org/10.1007/978-3-319-58673-1_40
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DOI: https://doi.org/10.1007/978-3-319-58673-1_40
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