export interface XY<T> {
    readonly x: T;
    readonly y: T;
}
export type IVec2 = XY<number>;
export interface DXY<T> {
    readonly dxx: T;
    readonly dxy: T;
    readonly dyx: T;
    readonly dyy: T;
}
export type IJacobian2 = DXY<number>;
