Method MathPHP\LinearAlgebra\Eigenvalue::qrAlgorithm() return type has no value type specified in iterable type array.

Method MathPHP\LinearAlgebra\Eigenvalue::qrIteration() has parameter $values with no value type specified in iterable type array.

Method MathPHP\LinearAlgebra\Eigenvalue::qrIteration() return type has no value type specified in iterable type array.

Dead catch - DivisionByZeroError is never thrown in the try block.

Method MathPHP\LinearAlgebra\Eigenvector::qrAlgorithm() has no return type specified.

Cannot access offset 0 on array<int, 0>|false.

Call to an undefined method MathPHP\LinearAlgebra\Matrix<float|int>|MathPHP\LinearAlgebra\ObjectMatrix::multiply().

Method MathPHP\LinearAlgebra\NumericMatrix::upperHessenberg() should return MathPHP\LinearAlgebra\NumericMatrix but returns $this(MathPHP\LinearAlgebra\NumericMatrix)|MathPHP\LinearAlgebra\ObjectMatrix.