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Theorem keridl 33460
Description: The kernel of a ring homomorphism is an ideal. (Contributed by Jeff Madsen, 3-Jan-2011.)
Hypotheses
Ref Expression
keridl.1 𝐺 = (1st𝑆)
keridl.2 𝑍 = (GId‘𝐺)
Assertion
Ref Expression
keridl ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹 “ {𝑍}) ∈ (Idl‘𝑅))

Proof of Theorem keridl
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2621 . . . 4 (1st𝑅) = (1st𝑅)
2 eqid 2621 . . . 4 ran (1st𝑅) = ran (1st𝑅)
3 keridl.1 . . . 4 𝐺 = (1st𝑆)
4 eqid 2621 . . . 4 ran 𝐺 = ran 𝐺
51, 2, 3, 4rngohomf 33394 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → 𝐹:ran (1st𝑅)⟶ran 𝐺)
6 cnvimass 5444 . . . 4 (𝐹 “ {𝑍}) ⊆ dom 𝐹
7 fdm 6008 . . . 4 (𝐹:ran (1st𝑅)⟶ran 𝐺 → dom 𝐹 = ran (1st𝑅))
86, 7syl5sseq 3632 . . 3 (𝐹:ran (1st𝑅)⟶ran 𝐺 → (𝐹 “ {𝑍}) ⊆ ran (1st𝑅))
95, 8syl 17 . 2 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹 “ {𝑍}) ⊆ ran (1st𝑅))
10 eqid 2621 . . . . 5 (GId‘(1st𝑅)) = (GId‘(1st𝑅))
111, 2, 10rngo0cl 33347 . . . 4 (𝑅 ∈ RingOps → (GId‘(1st𝑅)) ∈ ran (1st𝑅))
12113ad2ant1 1080 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (GId‘(1st𝑅)) ∈ ran (1st𝑅))
13 keridl.2 . . . . 5 𝑍 = (GId‘𝐺)
141, 10, 3, 13rngohom0 33400 . . . 4 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹‘(GId‘(1st𝑅))) = 𝑍)
15 fvex 6158 . . . . 5 (𝐹‘(GId‘(1st𝑅))) ∈ V
1615elsn 4163 . . . 4 ((𝐹‘(GId‘(1st𝑅))) ∈ {𝑍} ↔ (𝐹‘(GId‘(1st𝑅))) = 𝑍)
1714, 16sylibr 224 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹‘(GId‘(1st𝑅))) ∈ {𝑍})
18 ffn 6002 . . . 4 (𝐹:ran (1st𝑅)⟶ran 𝐺𝐹 Fn ran (1st𝑅))
19 elpreima 6293 . . . 4 (𝐹 Fn ran (1st𝑅) → ((GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}) ↔ ((GId‘(1st𝑅)) ∈ ran (1st𝑅) ∧ (𝐹‘(GId‘(1st𝑅))) ∈ {𝑍})))
205, 18, 193syl 18 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}) ↔ ((GId‘(1st𝑅)) ∈ ran (1st𝑅) ∧ (𝐹‘(GId‘(1st𝑅))) ∈ {𝑍})))
2112, 17, 20mpbir2and 956 . 2 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}))
22 an4 864 . . . . . . . 8 (((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ∧ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍})) ↔ ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ ((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍})))
231, 2, 3rngohomadd 33397 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) → (𝐹‘(𝑥(1st𝑅)𝑦)) = ((𝐹𝑥)𝐺(𝐹𝑦)))
2423adantr 481 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → (𝐹‘(𝑥(1st𝑅)𝑦)) = ((𝐹𝑥)𝐺(𝐹𝑦)))
25 oveq12 6613 . . . . . . . . . . . . . 14 (((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍) → ((𝐹𝑥)𝐺(𝐹𝑦)) = (𝑍𝐺𝑍))
2625adantl 482 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → ((𝐹𝑥)𝐺(𝐹𝑦)) = (𝑍𝐺𝑍))
273rngogrpo 33338 . . . . . . . . . . . . . . . 16 (𝑆 ∈ RingOps → 𝐺 ∈ GrpOp)
284, 13grpoidcl 27214 . . . . . . . . . . . . . . . . 17 (𝐺 ∈ GrpOp → 𝑍 ∈ ran 𝐺)
294, 13grpolid 27216 . . . . . . . . . . . . . . . . 17 ((𝐺 ∈ GrpOp ∧ 𝑍 ∈ ran 𝐺) → (𝑍𝐺𝑍) = 𝑍)
3028, 29mpdan 701 . . . . . . . . . . . . . . . 16 (𝐺 ∈ GrpOp → (𝑍𝐺𝑍) = 𝑍)
3127, 30syl 17 . . . . . . . . . . . . . . 15 (𝑆 ∈ RingOps → (𝑍𝐺𝑍) = 𝑍)
32313ad2ant2 1081 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝑍𝐺𝑍) = 𝑍)
3332ad2antrr 761 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → (𝑍𝐺𝑍) = 𝑍)
3424, 26, 333eqtrd 2659 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → (𝐹‘(𝑥(1st𝑅)𝑦)) = 𝑍)
3534ex 450 . . . . . . . . . . 11 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) → (((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍) → (𝐹‘(𝑥(1st𝑅)𝑦)) = 𝑍))
36 fvex 6158 . . . . . . . . . . . . 13 (𝐹𝑥) ∈ V
3736elsn 4163 . . . . . . . . . . . 12 ((𝐹𝑥) ∈ {𝑍} ↔ (𝐹𝑥) = 𝑍)
38 fvex 6158 . . . . . . . . . . . . 13 (𝐹𝑦) ∈ V
3938elsn 4163 . . . . . . . . . . . 12 ((𝐹𝑦) ∈ {𝑍} ↔ (𝐹𝑦) = 𝑍)
4037, 39anbi12i 732 . . . . . . . . . . 11 (((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍}) ↔ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍))
41 fvex 6158 . . . . . . . . . . . 12 (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ V
4241elsn 4163 . . . . . . . . . . 11 ((𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍} ↔ (𝐹‘(𝑥(1st𝑅)𝑦)) = 𝑍)
4335, 40, 423imtr4g 285 . . . . . . . . . 10 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) → (((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍}) → (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍}))
4443imdistanda 728 . . . . . . . . 9 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ ((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍})) → ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
451, 2rngogcl 33340 . . . . . . . . . . . 12 ((𝑅 ∈ RingOps ∧ 𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅))
46453expib 1265 . . . . . . . . . . 11 (𝑅 ∈ RingOps → ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅)))
47463ad2ant1 1080 . . . . . . . . . 10 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅)))
4847anim1d 587 . . . . . . . . 9 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍}) → ((𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
4944, 48syld 47 . . . . . . . 8 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ ((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍})) → ((𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
5022, 49syl5bi 232 . . . . . . 7 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ∧ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍})) → ((𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
51 elpreima 6293 . . . . . . . . 9 (𝐹 Fn ran (1st𝑅) → (𝑥 ∈ (𝐹 “ {𝑍}) ↔ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍})))
525, 18, 513syl 18 . . . . . . . 8 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝑥 ∈ (𝐹 “ {𝑍}) ↔ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍})))
53 elpreima 6293 . . . . . . . . 9 (𝐹 Fn ran (1st𝑅) → (𝑦 ∈ (𝐹 “ {𝑍}) ↔ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍})))
545, 18, 533syl 18 . . . . . . . 8 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝑦 ∈ (𝐹 “ {𝑍}) ↔ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍})))
5552, 54anbi12d 746 . . . . . . 7 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ (𝐹 “ {𝑍}) ∧ 𝑦 ∈ (𝐹 “ {𝑍})) ↔ ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ∧ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍}))))
56 elpreima 6293 . . . . . . . 8 (𝐹 Fn ran (1st𝑅) → ((𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ↔ ((𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
575, 18, 563syl 18 . . . . . . 7 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ↔ ((𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ {𝑍})))
5850, 55, 573imtr4d 283 . . . . . 6 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ (𝐹 “ {𝑍}) ∧ 𝑦 ∈ (𝐹 “ {𝑍})) → (𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍})))
5958impl 649 . . . . 5 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) ∧ 𝑦 ∈ (𝐹 “ {𝑍})) → (𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}))
6059ralrimiva 2960 . . . 4 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) → ∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}))
6137anbi2i 729 . . . . . . 7 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ↔ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍))
62 eqid 2621 . . . . . . . . . . . . . . . 16 (2nd𝑅) = (2nd𝑅)
631, 62, 2rngocl 33329 . . . . . . . . . . . . . . 15 ((𝑅 ∈ RingOps ∧ 𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
64633expb 1263 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
65643ad2antl1 1221 . . . . . . . . . . . . 13 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
6665anass1rs 848 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
6766adantlrr 756 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
68 eqid 2621 . . . . . . . . . . . . . . . 16 (2nd𝑆) = (2nd𝑆)
691, 2, 62, 68rngohommul 33398 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)))
7069anass1rs 848 . . . . . . . . . . . . . 14 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)))
7170adantlrr 756 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)))
72 oveq2 6612 . . . . . . . . . . . . . . 15 ((𝐹𝑥) = 𝑍 → ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)) = ((𝐹𝑧)(2nd𝑆)𝑍))
7372adantl 482 . . . . . . . . . . . . . 14 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍) → ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)) = ((𝐹𝑧)(2nd𝑆)𝑍))
7473ad2antlr 762 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)) = ((𝐹𝑧)(2nd𝑆)𝑍))
751, 2, 3, 4rngohomcl 33395 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹𝑧) ∈ ran 𝐺)
7613, 4, 3, 68rngorz 33351 . . . . . . . . . . . . . . . 16 ((𝑆 ∈ RingOps ∧ (𝐹𝑧) ∈ ran 𝐺) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
77763ad2antl2 1222 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝐹𝑧) ∈ ran 𝐺) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
7875, 77syldan 487 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
7978adantlr 750 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
8071, 74, 793eqtrd 2659 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = 𝑍)
81 fvex 6158 . . . . . . . . . . . . 13 (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ V
8281elsn 4163 . . . . . . . . . . . 12 ((𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ {𝑍} ↔ (𝐹‘(𝑧(2nd𝑅)𝑥)) = 𝑍)
8380, 82sylibr 224 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ {𝑍})
84 elpreima 6293 . . . . . . . . . . . . 13 (𝐹 Fn ran (1st𝑅) → ((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ↔ ((𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ {𝑍})))
855, 18, 843syl 18 . . . . . . . . . . . 12 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ↔ ((𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ {𝑍})))
8685ad2antrr 761 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ↔ ((𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ {𝑍})))
8767, 83, 86mpbir2and 956 . . . . . . . . . 10 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}))
881, 62, 2rngocl 33329 . . . . . . . . . . . . . . 15 ((𝑅 ∈ RingOps ∧ 𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
89883expb 1263 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
90893ad2antl1 1221 . . . . . . . . . . . . 13 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
9190anassrs 679 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
9291adantlrr 756 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
931, 2, 62, 68rngohommul 33398 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)))
9493anassrs 679 . . . . . . . . . . . . . 14 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)))
9594adantlrr 756 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)))
96 oveq1 6611 . . . . . . . . . . . . . . 15 ((𝐹𝑥) = 𝑍 → ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)) = (𝑍(2nd𝑆)(𝐹𝑧)))
9796adantl 482 . . . . . . . . . . . . . 14 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍) → ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)) = (𝑍(2nd𝑆)(𝐹𝑧)))
9897ad2antlr 762 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)) = (𝑍(2nd𝑆)(𝐹𝑧)))
9913, 4, 3, 68rngolz 33350 . . . . . . . . . . . . . . . 16 ((𝑆 ∈ RingOps ∧ (𝐹𝑧) ∈ ran 𝐺) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
100993ad2antl2 1222 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝐹𝑧) ∈ ran 𝐺) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
10175, 100syldan 487 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
102101adantlr 750 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
10395, 98, 1023eqtrd 2659 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = 𝑍)
104 fvex 6158 . . . . . . . . . . . . 13 (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ V
105104elsn 4163 . . . . . . . . . . . 12 ((𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ {𝑍} ↔ (𝐹‘(𝑥(2nd𝑅)𝑧)) = 𝑍)
106103, 105sylibr 224 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ {𝑍})
107 elpreima 6293 . . . . . . . . . . . . 13 (𝐹 Fn ran (1st𝑅) → ((𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}) ↔ ((𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ {𝑍})))
1085, 18, 1073syl 18 . . . . . . . . . . . 12 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}) ↔ ((𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ {𝑍})))
109108ad2antrr 761 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}) ↔ ((𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅) ∧ (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ {𝑍})))
11092, 106, 109mpbir2and 956 . . . . . . . . . 10 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))
11187, 110jca 554 . . . . . . . . 9 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍})))
112111ralrimiva 2960 . . . . . . . 8 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) → ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍})))
113112ex 450 . . . . . . 7 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍) → ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))
11461, 113syl5bi 232 . . . . . 6 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) → ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))
11552, 114sylbid 230 . . . . 5 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝑥 ∈ (𝐹 “ {𝑍}) → ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))
116115imp 445 . . . 4 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) → ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍})))
11760, 116jca 554 . . 3 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) → (∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))
118117ralrimiva 2960 . 2 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ∀𝑥 ∈ (𝐹 “ {𝑍})(∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))
1191, 62, 2, 10isidl 33442 . . 3 (𝑅 ∈ RingOps → ((𝐹 “ {𝑍}) ∈ (Idl‘𝑅) ↔ ((𝐹 “ {𝑍}) ⊆ ran (1st𝑅) ∧ (GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑥 ∈ (𝐹 “ {𝑍})(∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))))
1201193ad2ant1 1080 . 2 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝐹 “ {𝑍}) ∈ (Idl‘𝑅) ↔ ((𝐹 “ {𝑍}) ⊆ ran (1st𝑅) ∧ (GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑥 ∈ (𝐹 “ {𝑍})(∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}) ∧ ∀𝑧 ∈ ran (1st𝑅)((𝑧(2nd𝑅)𝑥) ∈ (𝐹 “ {𝑍}) ∧ (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))))))
1219, 21, 118, 120mpbir3and 1243 1 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹 “ {𝑍}) ∈ (Idl‘𝑅))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  w3a 1036   = wceq 1480  wcel 1987  wral 2907  wss 3555  {csn 4148  ccnv 5073  dom cdm 5074  ran crn 5075  cima 5077   Fn wfn 5842  wf 5843  cfv 5847  (class class class)co 6604  1st c1st 7111  2nd c2nd 7112  GrpOpcgr 27189  GIdcgi 27190  RingOpscrngo 33322   RngHom crnghom 33388  Idlcidl 33435
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-op 4155  df-uni 4403  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-id 4989  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-1st 7113  df-2nd 7114  df-map 7804  df-grpo 27193  df-gid 27194  df-ginv 27195  df-ablo 27245  df-ghomOLD 33312  df-rngo 33323  df-rngohom 33391  df-idl 33438
This theorem is referenced by: (None)
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