Everything in the objective function other than * p* is input data.

*and*

**y****is 10 * 1 vector.**

*a***is 10 * 1800 array.**

*A*

Everything in the objective function other than * p* is input data.

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help matrix_frac

`matrix_frac Matrix fractional function. matrix_frac(x,Y), where Y is a square matrix and x is a vector of the same size, computes x'*(inv(Y)*x) if Y is Hermitian positive definite, and +Inf otherwise. An error results if Y is not a square matrix, or the size of the vector x does not match the size of matrix Y. Disciplined convex programming information: matrix_frac is convex and nonmonotonic (at least with respect to elementwise comparison), so its argument must be affine.`