Kitten Within the first 2 days after birth, kittens acquire passive immunity from their mother’s milk. Milk within the first few days of parturition is called colostrum, and contains high concentrations of immunoglobulins. These include immunoglobulin A and immunoglobulin G which cross the intestinal barrier of the neonate. The immunoglobulins and growth factors found in the colostrum begin to establish and strengthen the weak immune system of the offspring. Kittens are able to chew solid food around 5–6 weeks after birth, and it is recommended that 30% of their diet should consist of solid food at this time. The kitten remains
Invariant of a binary form 4"c""a" − "a""d" of degree 4. The algebra of covariants is generated by the discriminant, the form itself (degree 1, order 3), the Hessian "H" (degree 2, order 2) and a covariant "T" of degree 3 and order 3. They are related by the syzygy 4"H"="Df"-"T" of degree 6 and order 6. The algebra of invariants of a quartic form is generated by invariants "i", "j" of degrees 2, 3. This ring is naturally isomorphic to the ring of modular forms of level 1, with the two generators corresponding to the Eisenstein series "E" and "E". The algebra of covariants