- Explicitely passed pred_subset_eq and pred_equals_eq as an argument to the
to_set and to_pred attributes, because it is no longer applied automatically
- Manually applied predicate1I in proof of accp_subset, because it is no longer
part of the claset
- Replaced psubset_def by less_le
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%% smart url or hyperref setup
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\else
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\else\pdfoutputtrue\fi
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\else
\message{No PDF output}
\usepackage{url}
\fi