[Merged by Bors] - feat: add a SpectrumRestricts structure
#10735
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when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
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when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
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SpectrumRestricts structureSpectrumRestricts structure
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when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
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when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
riccardobrasca
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when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
dagurtomas
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Mar 22, 2024
when `A` is and `S`-algebra and `R` is a subring of `S`, `SpectrumRestricts (a : A) (f : S → R)` means that the `S`-spectrum of `a` is entirely contained within the image of the `R`-spectrum of `a` under `algebraMap R S`. We include `f` because we want to explicitly specify the function that takes us back into `R` from `S`.
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when
Ais andS-algebra andRis a subring ofS,SpectrumRestricts (a : A) (f : S → R)means that theS-spectrum ofais entirely contained within the image of theR-spectrum ofaunderalgebraMap R S. We includefbecause we want to explicitly specify the function that takes us back intoRfromS.