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Definition df-isom 6056
 Description: Define the isomorphism predicate. We read this as "𝐻 is an 𝑅, 𝑆 isomorphism of 𝐴 onto 𝐵." Normally, 𝑅 and 𝑆 are ordering relations on 𝐴 and 𝐵 respectively. Definition 6.28 of [TakeutiZaring] p. 32, whose notation is the same as ours except that 𝑅 and 𝑆 are subscripts. (Contributed by NM, 4-Mar-1997.)
Assertion
Ref Expression
df-isom (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) ↔ (𝐻:𝐴1-1-onto𝐵 ∧ ∀𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦))))
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐵,𝑦   𝑥,𝑅,𝑦   𝑥,𝑆,𝑦   𝑥,𝐻,𝑦

Detailed syntax breakdown of Definition df-isom
StepHypRef Expression
1 cA . . 3 class 𝐴
2 cB . . 3 class 𝐵
3 cR . . 3 class 𝑅
4 cS . . 3 class 𝑆
5 cH . . 3 class 𝐻
61, 2, 3, 4, 5wiso 6048 . 2 wff 𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵)
71, 2, 5wf1o 6046 . . 3 wff 𝐻:𝐴1-1-onto𝐵
8 vx . . . . . . . 8 setvar 𝑥
98cv 1629 . . . . . . 7 class 𝑥
10 vy . . . . . . . 8 setvar 𝑦
1110cv 1629 . . . . . . 7 class 𝑦
129, 11, 3wbr 4802 . . . . . 6 wff 𝑥𝑅𝑦
139, 5cfv 6047 . . . . . . 7 class (𝐻𝑥)
1411, 5cfv 6047 . . . . . . 7 class (𝐻𝑦)
1513, 14, 4wbr 4802 . . . . . 6 wff (𝐻𝑥)𝑆(𝐻𝑦)
1612, 15wb 196 . . . . 5 wff (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦))
1716, 10, 1wral 3048 . . . 4 wff 𝑦𝐴 (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦))
1817, 8, 1wral 3048 . . 3 wff 𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦))
197, 18wa 383 . 2 wff (𝐻:𝐴1-1-onto𝐵 ∧ ∀𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦)))
206, 19wb 196 1 wff (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) ↔ (𝐻:𝐴1-1-onto𝐵 ∧ ∀𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 ↔ (𝐻𝑥)𝑆(𝐻𝑦))))
 Colors of variables: wff setvar class This definition is referenced by:  isoeq1  6728  isoeq2  6729  isoeq3  6730  isoeq4  6731  isoeq5  6732  nfiso  6733  isof1o  6734  isof1oidb  6735  isof1oopb  6736  isorel  6737  soisores  6738  soisoi  6739  isoid  6740  isocnv  6741  isocnv2  6742  isocnv3  6743  isores2  6744  isores3  6746  isotr  6747  isoini2  6750  f1oiso  6762  f1owe  6764  smoiso2  7633  alephiso  9109  compssiso  9386  negiso  11193  om2uzisoi  12945  icopnfhmeo  22941  reefiso  24399  logltb  24543  isoun  29786  xrmulc1cn  30283  wepwsolem  38112  iso0  39006  fourierdlem54  40878
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