what makes the square root of a covariance matrix positive definite in matlab? when to make a square root positive-definite matlab what function to use to make square roots of matrix positive how does matlab cholesky update work how to make cholesky positive definite which is a negative matrix and which is positive in matlab? what to do if the covariance matrix has zero negative what is the correct way to make a covariance matrix positive and negative in matlab? how to make cholesky downdate negative definite in matlab what makes cholesky positive what makes a matrix positive definite? how to make cholesky matrix positivedefinite in matlab matlab make square root of matrix positive-definite how to make the square root of a matrix positivedefinite how to make matrix positive-definite mate can cholesky make a matrix positive-definite what cholesky function can be used to make a negative definite matrix how to make cholesky matrix positive definite can you make a cholesky matrix positive-definite how to make choleski matrix positive definite