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.
Invariant of a binary form the form itself of degree 1 and order 1. The algebra of invariants of the quadratic form "ax" + 2"bxy" + "cy" is a polynomial algebra in 1 variable generated by the discriminant "b" − "ac" of degree 2. The algebra of covariants is a polynomial algebra in 2 variables generated by the discriminant together with the form "f" itself (of degree 1 and order 2). The algebra of invariants of the cubic form "ax" + 3"bx""y" + 3"cxy" + "dy" is a polynomial algebra in 1 variable generated by the discriminant "D" = 3"b""c" + 6"abcd" − 4"b""d" −