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1591Recover a Cholesky Pivot 1A positive definite matrix A = [[9, 6], [6, 13]] has Cholesky factor L = [[l11, 0], [l21, l22]] with positive diagonal. What is l22?数学简单数值题未尝试免费1592Recover a Missing Entry from a Cholesky Margin 2A matrix A = [[4, 2], [2, t]] has a Cholesky factor with positive diagonal entries 2 and 3. What is t?数学中等derivation未尝试免费1593Choose a Diagonal Entry to Hit a Cholesky Pivot 3For q(x,y) = 5x 2 + 4xy + ky 2, the Cholesky factor of the associated matrix is required to have second diagonal entry equal to 2. What value of k achieves that?数学中等derivation未尝试免费1595Coupling Consistent With a Target Cholesky Pivot 5A matrix A = [[9, k], [k, 10]] has a Cholesky factor whose second diagonal entry is exactly 1. What values of k are possible?数学困难derivation未尝试面试订阅