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Theorem keridl 34156
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 2770 . . . 4 (1st𝑅) = (1st𝑅)
2 eqid 2770 . . . 4 ran (1st𝑅) = ran (1st𝑅)
3 keridl.1 . . . 4 𝐺 = (1st𝑆)
4 eqid 2770 . . . 4 ran 𝐺 = ran 𝐺
51, 2, 3, 4rngohomf 34090 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → 𝐹:ran (1st𝑅)⟶ran 𝐺)
6 cnvimass 5626 . . . 4 (𝐹 “ {𝑍}) ⊆ dom 𝐹
7 fdm 6191 . . . 4 (𝐹:ran (1st𝑅)⟶ran 𝐺 → dom 𝐹 = ran (1st𝑅))
86, 7syl5sseq 3800 . . 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 2770 . . . . 5 (GId‘(1st𝑅)) = (GId‘(1st𝑅))
111, 2, 10rngo0cl 34043 . . . 4 (𝑅 ∈ RingOps → (GId‘(1st𝑅)) ∈ ran (1st𝑅))
12113ad2ant1 1126 . . 3 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (GId‘(1st𝑅)) ∈ ran (1st𝑅))
13 keridl.2 . . . . 5 𝑍 = (GId‘𝐺)
141, 10, 3, 13rngohom0 34096 . . . 4 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝐹‘(GId‘(1st𝑅))) = 𝑍)
15 fvex 6342 . . . . 5 (𝐹‘(GId‘(1st𝑅))) ∈ V
1615elsn 4329 . . . 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 6185 . . . 4 (𝐹:ran (1st𝑅)⟶ran 𝐺𝐹 Fn ran (1st𝑅))
19 elpreima 6480 . . . 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 684 . 2 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (GId‘(1st𝑅)) ∈ (𝐹 “ {𝑍}))
22 an4 627 . . . . . . . 8 (((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ∧ (𝑦 ∈ ran (1st𝑅) ∧ (𝐹𝑦) ∈ {𝑍})) ↔ ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) ∧ ((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍})))
231, 2, 3rngohomadd 34093 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) → (𝐹‘(𝑥(1st𝑅)𝑦)) = ((𝐹𝑥)𝐺(𝐹𝑦)))
2423adantr 466 . . . . . . . . . . . . 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 6801 . . . . . . . . . . . . . 14 (((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍) → ((𝐹𝑥)𝐺(𝐹𝑦)) = (𝑍𝐺𝑍))
2625adantl 467 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → ((𝐹𝑥)𝐺(𝐹𝑦)) = (𝑍𝐺𝑍))
273rngogrpo 34034 . . . . . . . . . . . . . . . 16 (𝑆 ∈ RingOps → 𝐺 ∈ GrpOp)
284, 13grpoidcl 27702 . . . . . . . . . . . . . . . . 17 (𝐺 ∈ GrpOp → 𝑍 ∈ ran 𝐺)
294, 13grpolid 27704 . . . . . . . . . . . . . . . . 17 ((𝐺 ∈ GrpOp ∧ 𝑍 ∈ ran 𝐺) → (𝑍𝐺𝑍) = 𝑍)
3028, 29mpdan 659 . . . . . . . . . . . . . . . 16 (𝐺 ∈ GrpOp → (𝑍𝐺𝑍) = 𝑍)
3127, 30syl 17 . . . . . . . . . . . . . . 15 (𝑆 ∈ RingOps → (𝑍𝐺𝑍) = 𝑍)
32313ad2ant2 1127 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → (𝑍𝐺𝑍) = 𝑍)
3332ad2antrr 697 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅))) ∧ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍)) → (𝑍𝐺𝑍) = 𝑍)
3424, 26, 333eqtrd 2808 . . . . . . . . . . . 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 397 . . . . . . . . . . 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 6342 . . . . . . . . . . . . 13 (𝐹𝑥) ∈ V
3736elsn 4329 . . . . . . . . . . . 12 ((𝐹𝑥) ∈ {𝑍} ↔ (𝐹𝑥) = 𝑍)
38 fvex 6342 . . . . . . . . . . . . 13 (𝐹𝑦) ∈ V
3938elsn 4329 . . . . . . . . . . . 12 ((𝐹𝑦) ∈ {𝑍} ↔ (𝐹𝑦) = 𝑍)
4037, 39anbi12i 604 . . . . . . . . . . 11 (((𝐹𝑥) ∈ {𝑍} ∧ (𝐹𝑦) ∈ {𝑍}) ↔ ((𝐹𝑥) = 𝑍 ∧ (𝐹𝑦) = 𝑍))
41 fvex 6342 . . . . . . . . . . . 12 (𝐹‘(𝑥(1st𝑅)𝑦)) ∈ V
4241elsn 4329 . . . . . . . . . . 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 553 . . . . . . . . 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 34036 . . . . . . . . . . . 12 ((𝑅 ∈ RingOps ∧ 𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅))
46453expib 1115 . . . . . . . . . . 11 (𝑅 ∈ RingOps → ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅)))
47463ad2ant1 1126 . . . . . . . . . 10 ((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) → ((𝑥 ∈ ran (1st𝑅) ∧ 𝑦 ∈ ran (1st𝑅)) → (𝑥(1st𝑅)𝑦) ∈ ran (1st𝑅)))
4847anim1d 590 . . . . . . . . 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 6480 . . . . . . . . 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 6480 . . . . . . . . 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 608 . . . . . . 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 6480 . . . . . . . 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 443 . . . . 5 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) ∧ 𝑦 ∈ (𝐹 “ {𝑍})) → (𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}))
6059ralrimiva 3114 . . . 4 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ (𝐹 “ {𝑍})) → ∀𝑦 ∈ (𝐹 “ {𝑍})(𝑥(1st𝑅)𝑦) ∈ (𝐹 “ {𝑍}))
6137anbi2i 601 . . . . . . 7 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) ∈ {𝑍}) ↔ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍))
62 eqid 2770 . . . . . . . . . . . . . . . 16 (2nd𝑅) = (2nd𝑅)
631, 62, 2rngocl 34025 . . . . . . . . . . . . . . 15 ((𝑅 ∈ RingOps ∧ 𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
64633expb 1112 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
65643ad2antl1 1199 . . . . . . . . . . . . 13 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
6665anass1rs 626 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
6766adantlrr 692 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑧(2nd𝑅)𝑥) ∈ ran (1st𝑅))
68 eqid 2770 . . . . . . . . . . . . . . . 16 (2nd𝑆) = (2nd𝑆)
691, 2, 62, 68rngohommul 34094 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑧 ∈ ran (1st𝑅) ∧ 𝑥 ∈ ran (1st𝑅))) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)))
7069anass1rs 626 . . . . . . . . . . . . . 14 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)))
7170adantlrr 692 . . . . . . . . . . . . 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 6800 . . . . . . . . . . . . . . 15 ((𝐹𝑥) = 𝑍 → ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)) = ((𝐹𝑧)(2nd𝑆)𝑍))
7372adantl 467 . . . . . . . . . . . . . 14 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍) → ((𝐹𝑧)(2nd𝑆)(𝐹𝑥)) = ((𝐹𝑧)(2nd𝑆)𝑍))
7473ad2antlr 698 . . . . . . . . . . . . 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 34091 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹𝑧) ∈ ran 𝐺)
7613, 4, 3, 68rngorz 34047 . . . . . . . . . . . . . . . 16 ((𝑆 ∈ RingOps ∧ (𝐹𝑧) ∈ ran 𝐺) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
77763ad2antl2 1200 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝐹𝑧) ∈ ran 𝐺) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
7875, 77syldan 571 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
7978adantlr 686 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → ((𝐹𝑧)(2nd𝑆)𝑍) = 𝑍)
8071, 74, 793eqtrd 2808 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑧(2nd𝑅)𝑥)) = 𝑍)
81 fvex 6342 . . . . . . . . . . . . 13 (𝐹‘(𝑧(2nd𝑅)𝑥)) ∈ V
8281elsn 4329 . . . . . . . . . . . 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 6480 . . . . . . . . . . . . 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 697 . . . . . . . . . . 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 684 . . . . . . . . . 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 34025 . . . . . . . . . . . . . . 15 ((𝑅 ∈ RingOps ∧ 𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
89883expb 1112 . . . . . . . . . . . . . 14 ((𝑅 ∈ RingOps ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
90893ad2antl1 1199 . . . . . . . . . . . . 13 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
9190anassrs 458 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ ran (1st𝑅))
9291adantlrr 692 . . . . . . . . . . 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 34094 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ 𝑧 ∈ ran (1st𝑅))) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)))
9493anassrs 458 . . . . . . . . . . . . . 14 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑥 ∈ ran (1st𝑅)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)))
9594adantlrr 692 . . . . . . . . . . . . 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 6799 . . . . . . . . . . . . . . 15 ((𝐹𝑥) = 𝑍 → ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)) = (𝑍(2nd𝑆)(𝐹𝑧)))
9796adantl 467 . . . . . . . . . . . . . 14 ((𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍) → ((𝐹𝑥)(2nd𝑆)(𝐹𝑧)) = (𝑍(2nd𝑆)(𝐹𝑧)))
9897ad2antlr 698 . . . . . . . . . . . . 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 34046 . . . . . . . . . . . . . . . 16 ((𝑆 ∈ RingOps ∧ (𝐹𝑧) ∈ ran 𝐺) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
100993ad2antl2 1200 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝐹𝑧) ∈ ran 𝐺) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
10175, 100syldan 571 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
102101adantlr 686 . . . . . . . . . . . . 13 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑍(2nd𝑆)(𝐹𝑧)) = 𝑍)
10395, 98, 1023eqtrd 2808 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝐹‘(𝑥(2nd𝑅)𝑧)) = 𝑍)
104 fvex 6342 . . . . . . . . . . . . 13 (𝐹‘(𝑥(2nd𝑅)𝑧)) ∈ V
105104elsn 4329 . . . . . . . . . . . 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 6480 . . . . . . . . . . . . 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 697 . . . . . . . . . . 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 684 . . . . . . . . . 10 ((((𝑅 ∈ RingOps ∧ 𝑆 ∈ RingOps ∧ 𝐹 ∈ (𝑅 RngHom 𝑆)) ∧ (𝑥 ∈ ran (1st𝑅) ∧ (𝐹𝑥) = 𝑍)) ∧ 𝑧 ∈ ran (1st𝑅)) → (𝑥(2nd𝑅)𝑧) ∈ (𝐹 “ {𝑍}))
11187, 110jca 495 . . . . . . . . 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 3114 . . . . . . . 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 397 . . . . . . 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 393 . . . 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 495 . . 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 3114 . 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 34138 . . 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 1126 . 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 1426 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 382  w3a 1070   = wceq 1630  wcel 2144  wral 3060  wss 3721  {csn 4314  ccnv 5248  dom cdm 5249  ran crn 5250  cima 5252   Fn wfn 6026  wf 6027  cfv 6031  (class class class)co 6792  1st c1st 7312  2nd c2nd 7313  GrpOpcgr 27677  GIdcgi 27678  RingOpscrngo 34018   RngHom crnghom 34084  Idlcidl 34131
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1869  ax-4 1884  ax-5 1990  ax-6 2056  ax-7 2092  ax-8 2146  ax-9 2153  ax-10 2173  ax-11 2189  ax-12 2202  ax-13 2407  ax-ext 2750  ax-rep 4902  ax-sep 4912  ax-nul 4920  ax-pow 4971  ax-pr 5034  ax-un 7095
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 827  df-3an 1072  df-tru 1633  df-ex 1852  df-nf 1857  df-sb 2049  df-eu 2621  df-mo 2622  df-clab 2757  df-cleq 2763  df-clel 2766  df-nfc 2901  df-ne 2943  df-ral 3065  df-rex 3066  df-reu 3067  df-rab 3069  df-v 3351  df-sbc 3586  df-csb 3681  df-dif 3724  df-un 3726  df-in 3728  df-ss 3735  df-nul 4062  df-if 4224  df-pw 4297  df-sn 4315  df-pr 4317  df-op 4321  df-uni 4573  df-iun 4654  df-br 4785  df-opab 4845  df-mpt 4862  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-riota 6753  df-ov 6795  df-oprab 6796  df-mpt2 6797  df-1st 7314  df-2nd 7315  df-map 8010  df-grpo 27681  df-gid 27682  df-ginv 27683  df-ablo 27733  df-ghomOLD 34008  df-rngo 34019  df-rngohom 34087  df-idl 34134
This theorem is referenced by: (None)
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