[Merged by Bors] - refactor: colimits in ModuleCat #6925
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This PR refactors the construction of colimits of modules in order to prove that the forgetful functor to abelian groups preserves colimits.
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This PR refactors the construction of colimits of modules in order to prove that the forgetful functor to abelian groups preserves colimits.
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This PR refactors the construction of colimits of modules in order to prove that the forgetful functor to abelian groups preserves colimits.
Basically, when a certain colimit in
ModuleCatexists inAddCommGroupCat, it also exists inModuleCat, and the forgetful functors preserves it.(In order to get suitable instances, the universe parameters have been generalized in the construction of colimits in
AddCommGroupCat.)