mathlib
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Define Banach algebras
- [x] Define Banach algebras: it turns out that we already have
normed_algebras; - [ ] Prove facts about convergence of series for Banach algebras;
- [ ] Migrate some functions to Banach algebras:
- [x]
exp(defined but duplicates real.exp and complex.exp) - [ ]
sin/...
- [x]