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    UC Berkeley Preliminary Exam Fall 1978

    SRC-BERKELEY-PRELIM-FALL-1978

    Area
    Prelim
    Status
    draft
    Source

    20 problems.

    1. A monotone increasing function has at most countably many jump discontinuities — Problem 1
    2. Uniformly convergent subsequence of indefinite integrals — Problem 2
    3. Local fourth roots of matrices near the identity — Problem 3
    4. Evaluate a Poisson-kernel-type trigonometric integral — Problem 4
    5. A contour integral involving the squared modulus of a polynomial — Problem 5
    6. Solve a first-order linear differential equation — Problem 6
    7. Left and right cosets and a nonnormal subgroup of the square group — Problem 7
    8. Characteristic polynomial and Jordan form of the all-ones matrix — Problem 8
    9. Orthogonality-preserving linear maps are scalar-unitary — Problem 9
    10. Count homomorphisms from \(C_2\times C_2\) to \(S_3\) — Problem 10
    11. Vanishing partial derivatives force constancy on a connected open set — Problem 11
    12. Vanishing limiting partial derivatives imply differentiability at the origin — Problem 12
    13. Exact vector fields on the plane and the angular-form obstruction — Problem 13
    14. Construct conformal maps between disks, half-planes, and sectors — Problem 14
    15. Determine the derivative from an extremal modulus value — Problem 15
    16. Determine similarity among six real matrices — Problem 16
    17. Automorphisms of the additive group of the rationals — Problem 17
    18. Finite multiplicative subgroups of the complex numbers are cyclic — Problem 18
    19. Express the inverse of a matrix as a polynomial in the matrix — Problem 19
    20. Eigenvalues of a compact family of matrices form a compact set — Problem 20