### Further corrections to ``Shimura Curve Computations''

David Jao offers the following list of further corrections:
• p.16, 2nd paragraph: missing ``F'' in the sentence ``If t_0 is a CM point with CM field F...''
• p.21, Sec.3.3, 2nd paragraph: The elliptic points --> the elliptic points; if and only iff --> if and only if
• p.23, Sec.3.5, first paragraph final sentence: we exist --> we exhibit
• p.24, Eq.48: too many closing parentheses
• p.25, Table 1: the D=-40 coordinate should be 2312 / 125
• p.26, Eq.52: s2' should be [-2e+5b-be] not [2e+5b-be]
• p.26, Eq.53: relation should be s2s2''s2's3=1
• p.27, penultimate paragraph: ``We next find an explicit rational functions'' should not have the word ``an''
• p.28-9 Eqs. 58, 59, 62: final summand in each equation is missing ``f''
• p.30, line 3: (62) is missing closing parenthesis
• p.30, line 11: (9b+4e-be)/2 should be (9b-4e-be)/2
• p.31, Table 3: missing the rational point 8489664 / 3152807 at D=-235
• Thus in p.30, first complete paragraph, first sentence, ``There are 21 rational CM points'' should read ``There are 22 rational CM points''
• p.39, line after Eq.83: ``two other real place'' --> ``two other real places''
• p.41, Sec.5.5, line 9: (35) is missing parentheses Thanks to David for these corrections.

Added Dec.'03: I also just noticed a typographical error on page 39, equation (85): the numerator of the right-hand side contains a factor 2072, which cannot be right (207 isn't prime); it should be 3072.

...and March '04: page 40, line 4: may fails --> may fail

...and September '04: pages 19, 20, 21, the underlined headings l=5, l=7, l=13 should have l in math mode. Less trivially, John Voight notes the following two corrections. On page 9, in the first line of text below formula (19), the factor (1-zeta)gamma should be zeta1-gamma. On page 41, the example l=73 cannot be right because it yields a curve of genus 2, not 1. I should have asked these questions for l=37, the largest genus-1 case (see the table on page 18); there the map has degree 38, still intractably large, and here Cremona's tables list nine curves of conductor 6l, in five isogeny classes (whereas for l=73 the counts are twenty -- not six, as I inexplicably wrote -- and seven respectively).

...and November '04: page 26, line -2, the opening parenthesis in ``Gamma(1)'' should not be an exponent [sic(k)].