Thu, 21 Mar 2019 14:18:37 +0000 paulson merged
Thu, 21 Mar 2019 14:18:22 +0000 paulson new material on topology: products, etc. Some renamings, esp continuous_on_topo -> continuous_map
Thu, 21 Mar 2019 14:54:25 +0100 wenzelm proper ISABELLE_OCAML_VERSION;
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