mathlib4
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feat(RingTheory/Flat): faithfully flat ring maps
Add definition of faithfully flat ring maps and show basic properties. Co-authored-by: Florent Schaffhauser (github: matematiflo) Co-authored-by: Jujian Zhang (github:@jjaassoonn) Co-authored-by: Yunzhou Xie (github:@whysoserioushah)
This contribution was created as part of the AIM workshop "Formalizing algebraic geometry" in June 2024.
- [x] depends on: #17803
- [x] depends on: #17805
- [x] depends on: #17484
- [x] depends on: #17869