| Step | Hyp | Ref
| Expression |
| 1 | | findcard2.4 |
. 2
⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) |
| 2 | | isfi 6820 |
. . 3
⊢ (𝑥 ∈ Fin ↔ ∃𝑤 ∈ ω 𝑥 ≈ 𝑤) |
| 3 | | breq2 4037 |
. . . . . . . 8
⊢ (𝑤 = ∅ → (𝑥 ≈ 𝑤 ↔ 𝑥 ≈ ∅)) |
| 4 | 3 | imbi1d 231 |
. . . . . . 7
⊢ (𝑤 = ∅ → ((𝑥 ≈ 𝑤 → 𝜑) ↔ (𝑥 ≈ ∅ → 𝜑))) |
| 5 | 4 | albidv 1838 |
. . . . . 6
⊢ (𝑤 = ∅ → (∀𝑥(𝑥 ≈ 𝑤 → 𝜑) ↔ ∀𝑥(𝑥 ≈ ∅ → 𝜑))) |
| 6 | | breq2 4037 |
. . . . . . . 8
⊢ (𝑤 = 𝑣 → (𝑥 ≈ 𝑤 ↔ 𝑥 ≈ 𝑣)) |
| 7 | 6 | imbi1d 231 |
. . . . . . 7
⊢ (𝑤 = 𝑣 → ((𝑥 ≈ 𝑤 → 𝜑) ↔ (𝑥 ≈ 𝑣 → 𝜑))) |
| 8 | 7 | albidv 1838 |
. . . . . 6
⊢ (𝑤 = 𝑣 → (∀𝑥(𝑥 ≈ 𝑤 → 𝜑) ↔ ∀𝑥(𝑥 ≈ 𝑣 → 𝜑))) |
| 9 | | breq2 4037 |
. . . . . . . 8
⊢ (𝑤 = suc 𝑣 → (𝑥 ≈ 𝑤 ↔ 𝑥 ≈ suc 𝑣)) |
| 10 | 9 | imbi1d 231 |
. . . . . . 7
⊢ (𝑤 = suc 𝑣 → ((𝑥 ≈ 𝑤 → 𝜑) ↔ (𝑥 ≈ suc 𝑣 → 𝜑))) |
| 11 | 10 | albidv 1838 |
. . . . . 6
⊢ (𝑤 = suc 𝑣 → (∀𝑥(𝑥 ≈ 𝑤 → 𝜑) ↔ ∀𝑥(𝑥 ≈ suc 𝑣 → 𝜑))) |
| 12 | | en0 6854 |
. . . . . . . 8
⊢ (𝑥 ≈ ∅ ↔ 𝑥 = ∅) |
| 13 | | findcard2.5 |
. . . . . . . . 9
⊢ 𝜓 |
| 14 | | findcard2.1 |
. . . . . . . . 9
⊢ (𝑥 = ∅ → (𝜑 ↔ 𝜓)) |
| 15 | 13, 14 | mpbiri 168 |
. . . . . . . 8
⊢ (𝑥 = ∅ → 𝜑) |
| 16 | 12, 15 | sylbi 121 |
. . . . . . 7
⊢ (𝑥 ≈ ∅ → 𝜑) |
| 17 | 16 | ax-gen 1463 |
. . . . . 6
⊢
∀𝑥(𝑥 ≈ ∅ → 𝜑) |
| 18 | | peano3 4632 |
. . . . . . . . . . . . 13
⊢ (𝑣 ∈ ω → suc 𝑣 ≠ ∅) |
| 19 | 18 | adantr 276 |
. . . . . . . . . . . 12
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → suc 𝑣 ≠ ∅) |
| 20 | | breq1 4036 |
. . . . . . . . . . . . . . . 16
⊢ (𝑤 = ∅ → (𝑤 ≈ suc 𝑣 ↔ ∅ ≈ suc 𝑣)) |
| 21 | 20 | anbi2d 464 |
. . . . . . . . . . . . . . 15
⊢ (𝑤 = ∅ → ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ↔ (𝑣 ∈ ω ∧ ∅ ≈ suc
𝑣))) |
| 22 | | peano1 4630 |
. . . . . . . . . . . . . . . . . 18
⊢ ∅
∈ ω |
| 23 | | peano2 4631 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑣 ∈ ω → suc 𝑣 ∈
ω) |
| 24 | | nneneq 6918 |
. . . . . . . . . . . . . . . . . 18
⊢ ((∅
∈ ω ∧ suc 𝑣
∈ ω) → (∅ ≈ suc 𝑣 ↔ ∅ = suc 𝑣)) |
| 25 | 22, 23, 24 | sylancr 414 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑣 ∈ ω → (∅
≈ suc 𝑣 ↔
∅ = suc 𝑣)) |
| 26 | 25 | biimpa 296 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑣 ∈ ω ∧ ∅
≈ suc 𝑣) →
∅ = suc 𝑣) |
| 27 | 26 | eqcomd 2202 |
. . . . . . . . . . . . . . 15
⊢ ((𝑣 ∈ ω ∧ ∅
≈ suc 𝑣) → suc
𝑣 =
∅) |
| 28 | 21, 27 | biimtrdi 163 |
. . . . . . . . . . . . . 14
⊢ (𝑤 = ∅ → ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → suc 𝑣 = ∅)) |
| 29 | 28 | com12 30 |
. . . . . . . . . . . . 13
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (𝑤 = ∅ → suc 𝑣 = ∅)) |
| 30 | 29 | necon3d 2411 |
. . . . . . . . . . . 12
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (suc 𝑣 ≠ ∅ → 𝑤 ≠ ∅)) |
| 31 | 19, 30 | mpd 13 |
. . . . . . . . . . 11
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → 𝑤 ≠ ∅) |
| 32 | 31 | ex 115 |
. . . . . . . . . 10
⊢ (𝑣 ∈ ω → (𝑤 ≈ suc 𝑣 → 𝑤 ≠ ∅)) |
| 33 | | nnfi 6933 |
. . . . . . . . . . . . . . . 16
⊢ (suc
𝑣 ∈ ω → suc
𝑣 ∈
Fin) |
| 34 | 23, 33 | syl 14 |
. . . . . . . . . . . . . . 15
⊢ (𝑣 ∈ ω → suc 𝑣 ∈ Fin) |
| 35 | 34 | adantr 276 |
. . . . . . . . . . . . . 14
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → suc 𝑣 ∈ Fin) |
| 36 | | enfi 6934 |
. . . . . . . . . . . . . . 15
⊢ (𝑤 ≈ suc 𝑣 → (𝑤 ∈ Fin ↔ suc 𝑣 ∈ Fin)) |
| 37 | 36 | adantl 277 |
. . . . . . . . . . . . . 14
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (𝑤 ∈ Fin ↔ suc 𝑣 ∈ Fin)) |
| 38 | 35, 37 | mpbird 167 |
. . . . . . . . . . . . 13
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → 𝑤 ∈ Fin) |
| 39 | | fin0 6946 |
. . . . . . . . . . . . 13
⊢ (𝑤 ∈ Fin → (𝑤 ≠ ∅ ↔
∃𝑧 𝑧 ∈ 𝑤)) |
| 40 | 38, 39 | syl 14 |
. . . . . . . . . . . 12
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (𝑤 ≠ ∅ ↔ ∃𝑧 𝑧 ∈ 𝑤)) |
| 41 | | simpll 527 |
. . . . . . . . . . . . . . 15
⊢ (((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ∧ 𝑧 ∈ 𝑤) → 𝑣 ∈ ω) |
| 42 | | dif1en 6940 |
. . . . . . . . . . . . . . . 16
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣 ∧ 𝑧 ∈ 𝑤) → (𝑤 ∖ {𝑧}) ≈ 𝑣) |
| 43 | 42 | 3expa 1205 |
. . . . . . . . . . . . . . 15
⊢ (((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ∧ 𝑧 ∈ 𝑤) → (𝑤 ∖ {𝑧}) ≈ 𝑣) |
| 44 | | fidifsnid 6932 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑤 ∈ Fin ∧ 𝑧 ∈ 𝑤) → ((𝑤 ∖ {𝑧}) ∪ {𝑧}) = 𝑤) |
| 45 | 38, 44 | sylan 283 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ∧ 𝑧 ∈ 𝑤) → ((𝑤 ∖ {𝑧}) ∪ {𝑧}) = 𝑤) |
| 46 | | vex 2766 |
. . . . . . . . . . . . . . . . . . 19
⊢ 𝑤 ∈ V |
| 47 | | difexg 4174 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑤 ∈ V → (𝑤 ∖ {𝑧}) ∈ V) |
| 48 | 46, 47 | ax-mp 5 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑤 ∖ {𝑧}) ∈ V |
| 49 | | breq1 4036 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → (𝑦 ≈ 𝑣 ↔ (𝑤 ∖ {𝑧}) ≈ 𝑣)) |
| 50 | 49 | anbi2d 464 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) ↔ (𝑣 ∈ ω ∧ (𝑤 ∖ {𝑧}) ≈ 𝑣))) |
| 51 | | uneq1 3310 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → (𝑦 ∪ {𝑧}) = ((𝑤 ∖ {𝑧}) ∪ {𝑧})) |
| 52 | 51 | sbceq1d 2994 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → ([(𝑦 ∪ {𝑧}) / 𝑥]𝜑 ↔ [((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑)) |
| 53 | 52 | imbi2d 230 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → ((∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [(𝑦 ∪ {𝑧}) / 𝑥]𝜑) ↔ (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑))) |
| 54 | 50, 53 | imbi12d 234 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑦 = (𝑤 ∖ {𝑧}) → (((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [(𝑦 ∪ {𝑧}) / 𝑥]𝜑)) ↔ ((𝑣 ∈ ω ∧ (𝑤 ∖ {𝑧}) ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑)))) |
| 55 | | breq1 4036 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑥 = 𝑦 → (𝑥 ≈ 𝑣 ↔ 𝑦 ≈ 𝑣)) |
| 56 | | findcard2.2 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜒)) |
| 57 | 55, 56 | imbi12d 234 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑥 = 𝑦 → ((𝑥 ≈ 𝑣 → 𝜑) ↔ (𝑦 ≈ 𝑣 → 𝜒))) |
| 58 | 57 | spv 1874 |
. . . . . . . . . . . . . . . . . . . 20
⊢
(∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → (𝑦 ≈ 𝑣 → 𝜒)) |
| 59 | | rspe 2546 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → ∃𝑣 ∈ ω 𝑦 ≈ 𝑣) |
| 60 | | isfi 6820 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑦 ∈ Fin ↔ ∃𝑣 ∈ ω 𝑦 ≈ 𝑣) |
| 61 | 59, 60 | sylibr 134 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → 𝑦 ∈ Fin) |
| 62 | | pm2.27 40 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑦 ≈ 𝑣 → ((𝑦 ≈ 𝑣 → 𝜒) → 𝜒)) |
| 63 | 62 | adantl 277 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → ((𝑦 ≈ 𝑣 → 𝜒) → 𝜒)) |
| 64 | | findcard2.6 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑦 ∈ Fin → (𝜒 → 𝜃)) |
| 65 | 61, 63, 64 | sylsyld 58 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → ((𝑦 ≈ 𝑣 → 𝜒) → 𝜃)) |
| 66 | 58, 65 | syl5 32 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → 𝜃)) |
| 67 | | vex 2766 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ 𝑦 ∈ V |
| 68 | | vex 2766 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ 𝑧 ∈ V |
| 69 | 68 | snex 4218 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ {𝑧} ∈ V |
| 70 | 67, 69 | unex 4476 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑦 ∪ {𝑧}) ∈ V |
| 71 | | findcard2.3 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑥 = (𝑦 ∪ {𝑧}) → (𝜑 ↔ 𝜃)) |
| 72 | 70, 71 | sbcie 3024 |
. . . . . . . . . . . . . . . . . . 19
⊢
([(𝑦 ∪
{𝑧}) / 𝑥]𝜑 ↔ 𝜃) |
| 73 | 66, 72 | imbitrrdi 162 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑣 ∈ ω ∧ 𝑦 ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [(𝑦 ∪ {𝑧}) / 𝑥]𝜑)) |
| 74 | 48, 54, 73 | vtocl 2818 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑣 ∈ ω ∧ (𝑤 ∖ {𝑧}) ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑)) |
| 75 | | dfsbcq 2991 |
. . . . . . . . . . . . . . . . . 18
⊢ (((𝑤 ∖ {𝑧}) ∪ {𝑧}) = 𝑤 → ([((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑 ↔ [𝑤 / 𝑥]𝜑)) |
| 76 | 75 | imbi2d 230 |
. . . . . . . . . . . . . . . . 17
⊢ (((𝑤 ∖ {𝑧}) ∪ {𝑧}) = 𝑤 → ((∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [((𝑤 ∖ {𝑧}) ∪ {𝑧}) / 𝑥]𝜑) ↔ (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 77 | 74, 76 | imbitrid 154 |
. . . . . . . . . . . . . . . 16
⊢ (((𝑤 ∖ {𝑧}) ∪ {𝑧}) = 𝑤 → ((𝑣 ∈ ω ∧ (𝑤 ∖ {𝑧}) ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 78 | 45, 77 | syl 14 |
. . . . . . . . . . . . . . 15
⊢ (((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ∧ 𝑧 ∈ 𝑤) → ((𝑣 ∈ ω ∧ (𝑤 ∖ {𝑧}) ≈ 𝑣) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 79 | 41, 43, 78 | mp2and 433 |
. . . . . . . . . . . . . 14
⊢ (((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) ∧ 𝑧 ∈ 𝑤) → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑)) |
| 80 | 79 | ex 115 |
. . . . . . . . . . . . 13
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (𝑧 ∈ 𝑤 → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 81 | 80 | exlimdv 1833 |
. . . . . . . . . . . 12
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (∃𝑧 𝑧 ∈ 𝑤 → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 82 | 40, 81 | sylbid 150 |
. . . . . . . . . . 11
⊢ ((𝑣 ∈ ω ∧ 𝑤 ≈ suc 𝑣) → (𝑤 ≠ ∅ → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 83 | 82 | ex 115 |
. . . . . . . . . 10
⊢ (𝑣 ∈ ω → (𝑤 ≈ suc 𝑣 → (𝑤 ≠ ∅ → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑)))) |
| 84 | 32, 83 | mpdd 41 |
. . . . . . . . 9
⊢ (𝑣 ∈ ω → (𝑤 ≈ suc 𝑣 → (∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → [𝑤 / 𝑥]𝜑))) |
| 85 | 84 | com23 78 |
. . . . . . . 8
⊢ (𝑣 ∈ ω →
(∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → (𝑤 ≈ suc 𝑣 → [𝑤 / 𝑥]𝜑))) |
| 86 | 85 | alrimdv 1890 |
. . . . . . 7
⊢ (𝑣 ∈ ω →
(∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → ∀𝑤(𝑤 ≈ suc 𝑣 → [𝑤 / 𝑥]𝜑))) |
| 87 | | nfv 1542 |
. . . . . . . 8
⊢
Ⅎ𝑤(𝑥 ≈ suc 𝑣 → 𝜑) |
| 88 | | nfv 1542 |
. . . . . . . . 9
⊢
Ⅎ𝑥 𝑤 ≈ suc 𝑣 |
| 89 | | nfsbc1v 3008 |
. . . . . . . . 9
⊢
Ⅎ𝑥[𝑤 / 𝑥]𝜑 |
| 90 | 88, 89 | nfim 1586 |
. . . . . . . 8
⊢
Ⅎ𝑥(𝑤 ≈ suc 𝑣 → [𝑤 / 𝑥]𝜑) |
| 91 | | breq1 4036 |
. . . . . . . . 9
⊢ (𝑥 = 𝑤 → (𝑥 ≈ suc 𝑣 ↔ 𝑤 ≈ suc 𝑣)) |
| 92 | | sbceq1a 2999 |
. . . . . . . . 9
⊢ (𝑥 = 𝑤 → (𝜑 ↔ [𝑤 / 𝑥]𝜑)) |
| 93 | 91, 92 | imbi12d 234 |
. . . . . . . 8
⊢ (𝑥 = 𝑤 → ((𝑥 ≈ suc 𝑣 → 𝜑) ↔ (𝑤 ≈ suc 𝑣 → [𝑤 / 𝑥]𝜑))) |
| 94 | 87, 90, 93 | cbval 1768 |
. . . . . . 7
⊢
(∀𝑥(𝑥 ≈ suc 𝑣 → 𝜑) ↔ ∀𝑤(𝑤 ≈ suc 𝑣 → [𝑤 / 𝑥]𝜑)) |
| 95 | 86, 94 | imbitrrdi 162 |
. . . . . 6
⊢ (𝑣 ∈ ω →
(∀𝑥(𝑥 ≈ 𝑣 → 𝜑) → ∀𝑥(𝑥 ≈ suc 𝑣 → 𝜑))) |
| 96 | 5, 8, 11, 17, 95 | finds1 4638 |
. . . . 5
⊢ (𝑤 ∈ ω →
∀𝑥(𝑥 ≈ 𝑤 → 𝜑)) |
| 97 | 96 | 19.21bi 1572 |
. . . 4
⊢ (𝑤 ∈ ω → (𝑥 ≈ 𝑤 → 𝜑)) |
| 98 | 97 | rexlimiv 2608 |
. . 3
⊢
(∃𝑤 ∈
ω 𝑥 ≈ 𝑤 → 𝜑) |
| 99 | 2, 98 | sylbi 121 |
. 2
⊢ (𝑥 ∈ Fin → 𝜑) |
| 100 | 1, 99 | vtoclga 2830 |
1
⊢ (𝐴 ∈ Fin → 𝜏) |