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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ac6mapd | Structured version Visualization version GIF version | ||
| Description: Axiom of choice equivalent, deduction form. (Contributed by Thierry Arnoux, 13-Oct-2025.) Remove dependency on ax-reg 9610 and ax-inf2 9666. (Revised by Timothy J. O'Malley, 15-Oct-2026.) |
| Ref | Expression |
|---|---|
| ac6mapd.1 | ⊢ (𝑦 = (𝑓‘𝑥) → (𝜓 ↔ 𝜒)) |
| ac6mapd.2 | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| ac6mapd.3 | ⊢ (𝜑 → 𝐵 ∈ 𝑊) |
| ac6mapd.4 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ 𝐵 𝜓) |
| Ref | Expression |
|---|---|
| ac6mapd | ⊢ (𝜑 → ∃𝑓 ∈ (𝐵 ↑m 𝐴)∀𝑥 ∈ 𝐴 𝜒) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ac6mapd.2 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 2 | ac6mapd.3 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊) | |
| 3 | ac6mapd.4 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ 𝐵 𝜓) | |
| 4 | 3 | ralrimiva 3158 | . . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜓) |
| 5 | ac6mapd.1 | . . . . 5 ⊢ (𝑦 = (𝑓‘𝑥) → (𝜓 ↔ 𝜒)) | |
| 6 | 5 | ac6 10582 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊 ∧ ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝜓) → ∃𝑓(𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 𝜒)) |
| 7 | 1, 2, 4, 6 | syl3anc 1399 | . . 3 ⊢ (𝜑 → ∃𝑓(𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 𝜒)) |
| 8 | 2, 1 | elmapd 8885 | . . . . . 6 ⊢ (𝜑 → (𝑓 ∈ (𝐵 ↑m 𝐴) ↔ 𝑓:𝐴⟶𝐵)) |
| 9 | 8 | biimprd 251 | . . . . 5 ⊢ (𝜑 → (𝑓:𝐴⟶𝐵 → 𝑓 ∈ (𝐵 ↑m 𝐴))) |
| 10 | 9 | anim1d 623 | . . . 4 ⊢ (𝜑 → ((𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 𝜒) → (𝑓 ∈ (𝐵 ↑m 𝐴) ∧ ∀𝑥 ∈ 𝐴 𝜒))) |
| 11 | 10 | eximdv 1952 | . . 3 ⊢ (𝜑 → (∃𝑓(𝑓:𝐴⟶𝐵 ∧ ∀𝑥 ∈ 𝐴 𝜒) → ∃𝑓(𝑓 ∈ (𝐵 ↑m 𝐴) ∧ ∀𝑥 ∈ 𝐴 𝜒))) |
| 12 | 7, 11 | mpd 16 | . 2 ⊢ (𝜑 → ∃𝑓(𝑓 ∈ (𝐵 ↑m 𝐴) ∧ ∀𝑥 ∈ 𝐴 𝜒)) |
| 13 | df-rex 3091 | . 2 ⊢ (∃𝑓 ∈ (𝐵 ↑m 𝐴)∀𝑥 ∈ 𝐴 𝜒 ↔ ∃𝑓(𝑓 ∈ (𝐵 ↑m 𝐴) ∧ ∀𝑥 ∈ 𝐴 𝜒)) | |
| 14 | 12, 13 | sylibr 237 | 1 ⊢ (𝜑 → ∃𝑓 ∈ (𝐵 ↑m 𝐴)∀𝑥 ∈ 𝐴 𝜒) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2147 ∀wral 3080 ∃wrex 3090 ⟶wf 6551 ‘cfv 6555 (class class class)co 7440 ↑m cmap 8872 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-ac2 10565 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-isom 6564 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-map 8874 df-en 8999 df-card 10044 df-ac 10219 |
| This theorem is used by: elrgspnsubrunlem2 33876 fldextrspunlsplem 34372 |
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