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    Berkeley preliminary exam Fall 1979

    SRC-BERKELEY-PRELIM-FALL-1979

    Area
    Prelim
    Status
    draft
    Source

    20 problems.

    1. A sparse polynomial of degree \(47\) has a zero in the unit disk — Fall 1979 Problem 1; repeated exactly as Fall 1989 Problem 16
    2. Sharp bound for a bounded upper-half-plane function vanishing at \(i\)
    3. Every finite group of order at least \(3\) has a nontrivial automorphism — Fall 1979 Problem 3; repeated exactly as Fall 1991 Problem 1
    4. Reduce polynomials modulo the ideal \((7,x-3)\) in \(\mathbb Z[x]\)
    5. A real skew-symmetric matrix has even rank
    6. A single Jordan-chain nilpotent has no square root
    7. Shift-operator eigenvectors and the Fibonacci subspace
    8. A harmonic-block sum converges to \(\log2\)
    9. Differentiate the Gaussian integral with respect to its scale parameter
    10. Solve an explicit two-dimensional linear ODE system
    11. A map of California has a unique point directly over the point it represents
    12. Connectedness of the graph versus continuity of a real-valued function
    13. Pointwise convergence of uniformly bounded-degree polynomials is uniform — Fall 1979 Problem 13; repeated exactly as Fall 1980 Problem 17
    14. Evenness and zeros of the solution of \(y''=-|y|\) — Fall 1979 Problem 14; repeated exactly as Summer 1981 Problem 20
    15. An entire function dominated by another is its scalar multiple — Fall 1979 Problem 15; entire domination implies scalar multiple
    16. The Euler beta integral \(\int_0^\infty x^{\alpha-1}/(1+x)\,dx\) — Fall 1979 Problem 16; Euler beta integral
    17. Schur triangularization by a unitary matrix
    18. Count symmetric matrices \(BQ\) for a diagonal matrix with distinct absolute eigenvalues
    19. The full matrix ring over a field has no proper nonzero two-sided ideals — Fall 1979 Problem 19; full matrix ring has no nonzero proper two-sided ideals
    20. Smith normal form and element orders for an abelian group on three generators