return &TriDense{
		mat: blas64_Triangular{
			Stride: 3,
			Uplo:   blas_Upper,
		},
	}
}

func (t *TriDense) isUpper() bool {
	return isUpperUplo(t.mat.Uplo)
}

func (t *TriDense) triKind() bool {
	return isUpperUplo(t.mat.Uplo)
}

func isUpperUplo(u int) bool {
	switch u {
	case blas_Upper:
		return true
	default:
		panic(badTriangle)
	}
}

func (t *TriDense) IsZero() bool {