/// <summary>
/// Check that the endpoints specify an interval and the function takes
/// opposite signs at the endpoints.
/// </summary>
/// <param name="lower">Lower endpoint.</param>
/// <param name="upper">Upper endpoint.</param>
/// <exception cref="NullArgumentException"> if the function has not been set.</exception>
/// <exception cref="NoBracketingException"> if the function has the same sign at
/// the endpoints.</exception>
protected void verifyBracketing(double lower, double upper)
{
UnivariateSolverUtils.verifyBracketing(function, lower, upper);
}
/// <summary>
/// Check that <c>lower < initial < upper</c>.
/// </summary>
/// <param name="lower">Lower endpoint.</param>
/// <param name="initial">Initial value.</param>
/// <param name="upper">Upper endpoint.</param>
/// <exception cref="NumberIsTooLargeException"> if <c>lower >= initial</c> or
/// <c>initial >= upper</c>.</exception>
protected void verifySequence(double lower, double initial, double upper)
{
UnivariateSolverUtils.verifySequence(lower, initial, upper);
}
/// <summary>
/// Check whether the arguments form a (strictly) increasing sequence.
/// </summary>
/// <param name="start">First number.</param>
/// <param name="mid">Second number.</param>
/// <param name="end">Third number.</param>
/// <returns><c>true</c> if the arguments form an increasing sequence.</returns>
protected Boolean isSequence(double start, double mid, double end)
{
return(UnivariateSolverUtils.isSequence(start, mid, end));
}
/// <summary>
/// Check that the endpoints specify an interval.
/// </summary>
/// <param name="lower">Lower endpoint.</param>
/// <param name="upper">Upper endpoint.</param>
/// <exception cref="NumberIsTooLargeException"> if <c>lower >= upper</c></exception>
protected void verifyInterval(double lower, double upper)
{
UnivariateSolverUtils.verifyInterval(lower, upper);
}
/// <summary>
/// Check whether the function takes opposite signs at the endpoints.
/// </summary>
/// <param name="lower">Lower endpoint.</param>
/// <param name="upper">Upper endpoint.</param>
/// <returns><c>true</c> if the function values have opposite signs at the
/// given points.</returns>
protected Boolean isBracketing(double lower, double upper)
{
return(UnivariateSolverUtils.isBracketing(function, lower, upper));
}