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| Mirrors > Home > ILE Home > Th. List > basm | GIF version | ||
| Description: A structure whose base is inhabited is inhabited. (Contributed by Jim Kingdon, 14-Jun-2025.) |
| Ref | Expression |
|---|---|
| basm.b | ⊢ 𝐵 = (Base‘𝐺) |
| Ref | Expression |
|---|---|
| basm | ⊢ (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝐺) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 | . . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ 𝐵) | |
| 2 | basm.b | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
| 3 | baseid 13138 | . . . . 5 ⊢ Base = Slot (Base‘ndx) | |
| 4 | 2 | basmex 13144 | . . . . 5 ⊢ (𝐴 ∈ 𝐵 → 𝐺 ∈ V) |
| 5 | basendxnn 13140 | . . . . . 6 ⊢ (Base‘ndx) ∈ ℕ | |
| 6 | 5 | a1i 9 | . . . . 5 ⊢ (𝐴 ∈ 𝐵 → (Base‘ndx) ∈ ℕ) |
| 7 | 3, 4, 6 | strnfvnd 13104 | . . . 4 ⊢ (𝐴 ∈ 𝐵 → (Base‘𝐺) = (𝐺‘(Base‘ndx))) |
| 8 | 2, 7 | eqtrid 2276 | . . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐵 = (𝐺‘(Base‘ndx))) |
| 9 | 1, 8 | eleqtrd 2310 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (𝐺‘(Base‘ndx))) |
| 10 | elfvm 5672 | . 2 ⊢ (𝐴 ∈ (𝐺‘(Base‘ndx)) → ∃𝑗 𝑗 ∈ 𝐺) | |
| 11 | 9, 10 | syl 14 | 1 ⊢ (𝐴 ∈ 𝐵 → ∃𝑗 𝑗 ∈ 𝐺) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∃wex 1540 ∈ wcel 2202 Vcvv 2802 ‘cfv 5326 ℕcn 9143 ndxcnx 13081 Basecbs 13084 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-cnex 8123 ax-resscn 8124 ax-1re 8126 ax-addrcl 8129 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-sbc 3032 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-iota 5286 df-fun 5328 df-fn 5329 df-fv 5334 df-inn 9144 df-ndx 13087 df-slot 13088 df-base 13090 |
| This theorem is referenced by: relelbasov 13147 |
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