Math 421: Final exam topics

The final exam covers the entire semester’s work—so see also Exam 1 Topics and Exam 2 Topics pages .

The additional topics since Exam 2 are:

  • Evaluating contour integrals (secs. 6.5 and 7.5):
    • Cauchy’s Integral Formula and Cauchy’s Integral Formula for Derivatives
    • The Residue Theorem
  • Liouville’s Theorem and Fundamental Theorem of Algebra (in sec. 6.6):
    statements; proof of Fundamental Theorem of Algebra
  • Series expansions of functions (secs. 7.2–7.3):
    • Uniqueness of power series expansion in a disk
    • Taylor series of a function that’s holomorphic in a disk
    • Laurent series expansion on an annulus of a function holomorphic on that annulus
    • Manipulation of geometric series to find Laurent series expansion
    • Sum of a Laurent series (of of a Taylor series) may be differentiated term-by-term—and hence integrated term-by-term—in the annulus where it is defined
  • Zeros and singularities (sec. 7.4):
    • Order of a zero of a function
    • Classification of singularities: isolated vs. non-isolated; for isolated singularities—removable, pole, and essential
    • Order of a pole: definition; finding from Laurent series; finding the order of a pole z0 when the function has form g(z)/h(z)  and you know the order of the zero z0 of g(z) and h(z)
  • Residues (sec. 8.1):
    • Definition of residue in terms of Laurent series
    • Formula for finding residue at a pole of order k; special case of the formula when the pole is simple (i.e., of order 1)
    • The Residue Theorem
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