feat/chore: move definition of surfaces#141
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alreadydone wants to merge 5 commits intoleanprover:mainfrom
Open
feat/chore: move definition of surfaces#141alreadydone wants to merge 5 commits intoleanprover:mainfrom
alreadydone wants to merge 5 commits intoleanprover:mainfrom
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I have a definition of mapping class groups and would like to state some facts about MCGs of surfaces, so I'm moving definition of surfaces to a Prelude file. Also:
changes their namespace from ClassificationOfSurfaces to Surface.
removes the redundant IsManifold condition from classification of surfaces statement.
defines 3D handlebodies and add a problem to show the boundary of a genus g handlebody is a genus g surface. I plan to use these handlebodies to state Heegaard splittings.
defines action of continuous maps on singular homology as a homomorphism. Will be used to define orientation-preserving/reversing maps.