| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > fodjuf | GIF version | ||
| Description: Lemma for fodjuomni 7495 and fodjumkv 7506. 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 6718 | . . . . 5 ⊢ ∅ ∈ 2o | |
| 2 | 1 | a1i 9 | . . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝑂) → ∅ ∈ 2o) |
| 3 | 1lt2o 6719 | . . . . 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 7490 | . . . 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 5865 | . 2 ⊢ (𝜑 → 𝑃:𝑂⟶2o) |
| 10 | 2onn 6798 | . . . 4 ⊢ 2o ∈ ω | |
| 11 | 10 | a1i 9 | . . 3 ⊢ (𝜑 → 2o ∈ ω) |
| 12 | fodjuf.o | . . 3 ⊢ (𝜑 → 𝑂 ∈ 𝑉) | |
| 13 | 11, 12 | elmapd 6940 | . 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 4193 ωcom 4739 ⟶wf 5376 –onto→wfo 5378 ‘cfv 5380 (class class class)co 6088 1oc1o 6684 2oc2o 6685 ↑𝑚 cmap 6926 ⊔ cdju 7383 inlcinl 7391 |
| 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 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 |
| 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 4132 df-opab 4194 df-mpt 4195 df-tr 4232 df-id 4440 df-iord 4513 df-on 4515 df-suc 4518 df-iom 4740 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-ov 6091 df-oprab 6092 df-mpo 6093 df-1st 6378 df-2nd 6379 df-1o 6691 df-2o 6692 df-map 6928 df-dju 7384 df-inl 7393 df-inr 7394 |
| This theorem is used by: fodjuomnilemres 7494 fodjumkvlemres 7505 |
| Copyright terms: Public domain | W3C validator |