Paper 5:  Computing with the analytic Jacobian of a genus 2 curve
          by Paul B. van Wamelen

The code for this paper takes around 12 seconds to run on a
64-bit 2.4GHz AMD processor.

Changes since book release:

V2.14:  The intrinsic FrobeniusForm has been renamed to
        FrobeniusFormAlternating.

V2.12:  Minor updates made to reflect the change in real and complex
        fields since V2.11 (now based on MPFR rather than PARI).

        Algorithm changes (possibly due to the above) mean that the
        results of various calls, while still correct, may not be the
        same as before.  There have been some additions to properly
        handle this possibility, in three places:

        + Since MAGens arises from a set, the first matrix may not be
          the correct choice.  A test has been added to check for this,
          and use the second matrix if so.
        + The entries in the alpha matrices may now live in degree 8
          fields rather than degree 4.  The degree in the call to
          MyPowerRelation has been adjusted to reflect this.
        + The exact list may be different, leading to a different
          nullspace of the matrix.  The computation of alpha has been
          changed to reflect this.