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Search results for “positive characteristic”

63 results

Determinant via Permutations

2026TheorySergey

The direct definition of a determinant via permutations: inversions, parity, and a sum of n! terms.

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170

Inverse Matrices

2026TheorySergey

Nonsingular matrices, the invertibility criterion, the adjugate-matrix formula, and the Gauss–Jordan method.
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120

IMO 1963

2026Problem sheet

International mathematics competition for pre-university students, held annually since 1959. Six problems over two days.
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230