e value and choice of blending functons used for
    \(A_0\) to \(A_3\) depend on the
    shape parameters \(s_{k+1}\) and \(s_{k+2}\):

    $$\begin{array}{l}

    A_0 = &amp;
    \begin{cases}
    h(-t, -s_{k+1}), \\
    f(t - s_{k+1}, -1 - s_{k+1}), \\
    0,
    \end{cases}
    &amp;
    \begin{array}{l}
    \text{if \(s_{k+1} \lt 0\)} \\
    \text{if \(s_{k+1} \ge 0\) and \(t \lt s_{k+1}\)} \\
    \text{otherwise}
    \end{array}
    \\[1em]

    A_1 = &amp;
    \begin{cases}
    g(1 - t, -s_{k+2}), \\