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Mirrors > Home > ILE Home > Th. List > isof1o | GIF version |
Description: An isomorphism is a one-to-one onto function. (Contributed by NM, 27-Apr-2004.) |
Ref | Expression |
---|---|
isof1o | ⊢ (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) → 𝐻:𝐴–1-1-onto→𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-isom 4911 | . 2 ⊢ (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) ↔ (𝐻:𝐴–1-1-onto→𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥𝑅𝑦 ↔ (𝐻‘𝑥)𝑆(𝐻‘𝑦)))) | |
2 | 1 | simplbi 259 | 1 ⊢ (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) → 𝐻:𝐴–1-1-onto→𝐵) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 98 ∀wral 2306 class class class wbr 3764 –1-1-onto→wf1o 4901 ‘cfv 4902 Isom wiso 4903 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 |
This theorem depends on definitions: df-bi 110 df-isom 4911 |
This theorem is referenced by: isocnv2 5452 isores1 5454 isoini 5457 isoini2 5458 isoselem 5459 isose 5460 isopolem 5461 isosolem 5463 smoiso 5917 ordiso2 6357 |
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