Tarte Tatin and 1917; whereas Maxim's was purchased by the Vaudable family in 1932. Originally, the tarte Tatin was made with two regional apple varieties: Reine des Reinettes (Queen of the Pippins), and Calville. Over the years, other varieties have tended to displace them, including Golden Delicious, Granny Smith, Fuji and Gala. When choosing apples for a tarte Tatin, it is important to pick some that will hold their shape while cooking, and not melt into apple sauce. In North America, Golden Delicious, Granny Smith, or Jonathan are excellent choices . Tarte Tatin can also be made with pears, quinces, peaches, pineapple,
Morphism of algebraic varieties Morphism of algebraic varieties In algebraic geometry, a morphism between algebraic varieties is a function between the varieties that is given locally by polynomials. It is also called a regular map. A morphism from an algebraic variety to the affine line is also called a regular function. A regular map whose inverse is also regular is called biregular, and they are isomorphisms in the category of algebraic varieties. Because regular and biregular are very restrictive conditions – there are no non-constant regular functions on projective varieties – the weaker condition of a rational map and birational maps are frequently used