Milk product obtained from other mammals for consumption by humans of all ages. In almost all mammals, milk is fed to infants through breastfeeding, either directly or by expressing the milk to be stored and consumed later. The early milk from mammals is called colostrum. Colostrum contains antibodies that provide protection to the newborn baby as well as nutrients and growth factors. The makeup of the colostrum and the period of secretion varies from species to species. For humans, the World Health Organization recommends exclusive breastfeeding for six months and breastfeeding in addition to other food for at least two years.
Sesquilinear form basis of , a sesquilinear form is represented by a matrix , by the column vector , and by the column vector : The components of are given by . A complex Hermitian form (also called a symmetric sesquilinear form), is a sesquilinear form such that The standard Hermitian form on is given (again, using the "physics" convention of linearity in the second and conjugate linearity in the first variable) by More generally, the inner product on any complex Hilbert space is a Hermitian form. A vector space with a Hermitian form is called a Hermitian space. The matrix representation