| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > fodjuf | GIF version | ||
| Description: Lemma for fodjuomni 7489 and fodjumkv 7500. Domain and range of 𝑃. (Contributed by Jim Kingdon, 27-Jul-2022.) (Revised by Jim Kingdon, 25-Mar-2023.) |
| Ref | Expression |
|---|---|
| fodjuf.fo | ⊢ (𝜑 → 𝐹:𝑂–onto→(𝐴 ⊔ 𝐵)) |
| fodjuf.p | ⊢ 𝑃 = (𝑦 ∈ 𝑂 ↦ if(∃𝑧 ∈ 𝐴 (𝐹‘𝑦) = (inl‘𝑧), ∅, 1o)) |
| fodjuf.o | ⊢ (𝜑 → 𝑂 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| fodjuf | ⊢ (𝜑 → 𝑃 ∈ (2o ↑𝑚 𝑂)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0lt2o 6714 | . . . . 5 ⊢ ∅ ∈ 2o | |
| 2 | 1 | a1i 9 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝑂) → ∅ ∈ 2o) |
| 3 | 1lt2o 6715 | . . . . 5 ⊢ 1o ∈ 2o | |
| 4 | 3 | a1i 9 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝑂) → 1o ∈ 2o) |
| 5 | fodjuf.fo | . . . . 5 ⊢ (𝜑 → 𝐹:𝑂–onto→(𝐴 ⊔ 𝐵)) | |
| 6 | 5 | fodjuomnilemdc 7484 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝑂) → DECID ∃𝑧 ∈ 𝐴 (𝐹‘𝑦) = (inl‘𝑧)) |
| 7 | 2, 4, 6 | ifcldcd 3678 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝑂) → if(∃𝑧 ∈ 𝐴 (𝐹‘𝑦) = (inl‘𝑧), ∅, 1o) ∈ 2o) |
| 8 | fodjuf.p | . . 3 ⊢ 𝑃 = (𝑦 ∈ 𝑂 ↦ if(∃𝑧 ∈ 𝐴 (𝐹‘𝑦) = (inl‘𝑧), ∅, 1o)) | |
| 9 | 7, 8 | fmptd 5862 | . 2 ⊢ (𝜑 → 𝑃:𝑂⟶2o) |
| 10 | 2onn 6794 | . . . 4 ⊢ 2o ∈ ω | |
| 11 | 10 | a1i 9 | . . 3 ⊢ (𝜑 → 2o ∈ ω) |
| 12 | fodjuf.o | . . 3 ⊢ (𝜑 → 𝑂 ∈ 𝑉) | |
| 13 | 11, 12 | elmapd 6936 | . 2 ⊢ (𝜑 → (𝑃 ∈ (2o ↑𝑚 𝑂) ↔ 𝑃:𝑂⟶2o)) |
| 14 | 9, 13 | mpbird 167 | 1 ⊢ (𝜑 → 𝑃 ∈ (2o ↑𝑚 𝑂)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ∃wrex 2529 ∅c0 3520 ifcif 3638 ↦ cmpt 4192 ωcom 4737 ⟶wf 5373 –onto→wfo 5375 ‘cfv 5377 (class class class)co 6085 1oc1o 6680 2oc2o 6681 ↑𝑚 cmap 6922 ⊔ cdju 7377 inlcinl 7385 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 |
| This proof depends on definitions: df-bi 117 df-dc 847 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-id 4438 df-iord 4511 df-on 4513 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-1o 6687 df-2o 6688 df-map 6924 df-dju 7378 df-inl 7387 df-inr 7388 |
| This theorem is used by: fodjuomnilemres 7488 fodjumkvlemres 7499 |
| Copyright terms: Public domain | W3C validator |