Exams
Exam 2
The second exam will take place in class on Thursday Dec 11. It
will be a closed-book and
closed-notes exam. Scratch papers will be distributed
and calculators and drawing tools will be allowed.
The emphasis is on understanding and applying the covered techniques
rather than on sheer memorization. Nevertheless, you do need to
remember basic definitions such as gradient and Hessian, as well as
important equations such as Euler's (for different types of variational problems).
The following topics are covered in the exam:
- Nonlinear Equations: bisection, regula falsi
and its modified version, secant method, Newton's method.
- Polynomials: evaluation, Horner scheme, multiplication,
FFT, root counting, root bounds, deflation, Newton's and Muller's
methods.
- Singular Value Decomposition: null space, row and column
spaces, singular values and their computation, SVD solution of a
linear system, pseudoinverse.
- Data Fitting: basis function, least-squares fitting, normal
equations.
- Orthogonal Polynomials: inner product on function space,
recursive generation of orthogonal polynomials, least-squares
approximation.
- Fourier Series: time and frequency domains, inner product
for trigonometric functions, amplitude, frequency, period, phase angle,
aliasing, sampling theorem.
- Nonlinear Optimization: Golden section search, gradient &
Hessian, convex functions, steepest descent, line search,
Q-orthogonality, conjugate gradient method, constrained optimization,
Lagrange multipliers.
- Calculus of Variations: functional, varitional derivative,
Euler's equation (and four special types of integrands), cases of
variable end points, several variables, and multiple unknown
functions.
- Linear Programming: Standard forms and conversions (slack,
surplus, and free variables), basic feasible solutions.
Exam 1
Exam 1 of Com S 477/577 will take place in class on
Thursday, Oct 16. It will be a closed-book and closed-notes exam. Scratch papers will be
distributed and calculators and drawing tools will be allowed.
The emphasis is on understanding and applying the covered techniques
rather than on sheer memorization. Complex formulae and relatively
insignificant theorems (such as reflection matrix, rotation matrix
about an arbitrary axis, homogeneous projection matrix), if appear on
the exam, will be available to you with adequate descriptions.
Nevertheless, you do need to have some basic knowledge, for example,
rotation matrices about the three coordinate axes, rotation axis and
angle from an orthogonal matrix with unit determinant, quaternion
multiplication, quaternion rotation operator, the Frenet apparatus
(including curvature & torsion) of a parametric curve, first and
second fundamental forms, principal curvatures.
The exam will cover the following topics:
- Homogeneous Coordinates: definition, projective plane, points at infinity,
visualization, coordinates of point, line, and plane,
- Plane and Space Transformations: translation, rotation,
scaling, reflection, inverse transformation, all in Cartesian as well
as homogeneous coordinates.
- Projections: perspective and parallel projections of plane
and space, viewplane coordinates, foreshortening ratio, orthographic
and oblique projections, vanishing point for perspective projection.
- Rotations: rotations about the fixed coordinate axes, about
an arbitrary line, and about the body frame; Euler angles, solutions
of rotation axis and angle.
- Quaternions: addition, multiplication, complex conjugates, inverse,
rotation operator.
- Plane Curves: Velocity, speed, arc length, regularity, cusp,
unit-speed reparametrization, tangent, normal, tangential angle,
curvature, center of curvature, osculating circle, radius of
curvature, total curvature, inflection, vertex, area of a simple
closed curve.
- Space Curves (unit- and arbitrary-speed): Principal normal,
binormal, torsion, Frenet formulas, osculating plane, approximation,
spherical image.
- Algebraic Curves: singular points, local parametrization,
curvature evaluation.
- Surfaces: surface patch, orientable surface, special surfaces, surface
curves (length, geodesic curvature), the first & second fundamental forms, surface area.
- Surface Curvatures: normal curvature, principal curvatures and directions,
Gaussian and mean curvatures, Gauss map, total Gaussian curvature.