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2008-09-25 Claudio Sacerdoti... ...
2008-09-18 Claudio Sacerdoti... Major reordering of theorems in the appropriate files.
2008-09-18 Claudio Sacerdoti... Precedence level of \downarrow changed to match that...
2008-09-16 Claudio Sacerdoti... formal_map now defined
2008-09-16 Claudio Sacerdoti... Definition of formal_topologies.