| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > uhgr0 | GIF version | ||
| Description: The null graph represented by an empty set is a hypergraph. (Contributed by AV, 9-Oct-2020.) |
| Ref | Expression |
|---|---|
| uhgr0 | ⊢ ∅ ∈ UHGraph |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f0 5583 | . . 3 ⊢ ∅:∅⟶∅ | |
| 2 | dm0 4995 | . . . 4 ⊢ dom ∅ = ∅ | |
| 3 | pw0ss 16336 | . . . 4 ⊢ {𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} = ∅ | |
| 4 | 2, 3 | feq23i 5528 | . . 3 ⊢ (∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} ↔ ∅:∅⟶∅) |
| 5 | 1, 4 | mpbir 146 | . 2 ⊢ ∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} |
| 6 | 0ex 4260 | . . 3 ⊢ ∅ ∈ V | |
| 7 | vtxval0 16306 | . . . . 5 ⊢ (Vtx‘∅) = ∅ | |
| 8 | 7 | eqcomi 2242 | . . . 4 ⊢ ∅ = (Vtx‘∅) |
| 9 | iedgval0 16307 | . . . . 5 ⊢ (iEdg‘∅) = ∅ | |
| 10 | 9 | eqcomi 2242 | . . . 4 ⊢ ∅ = (iEdg‘∅) |
| 11 | 8, 10 | isuhgrm 16324 | . . 3 ⊢ (∅ ∈ V → (∅ ∈ UHGraph ↔ ∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠})) |
| 12 | 6, 11 | ax-mp 5 | . 2 ⊢ (∅ ∈ UHGraph ↔ ∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠}) |
| 13 | 5, 12 | mpbir 146 | 1 ⊢ ∅ ∈ UHGraph |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ↔ wb 105 ∃wex 1545 ∈ wcel 2209 {crab 2532 Vcvv 2821 ∅c0 3520 𝒫 cpw 3688 dom cdm 4774 ⟶wf 5373 ‘cfv 5377 Vtxcvtx 16265 iEdgciedg 16266 UHGraphcuhgr 16320 |
| 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 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-mulcom 8280 ax-addass 8281 ax-mulass 8282 ax-distr 8283 ax-i2m1 8284 ax-1rid 8286 ax-0id 8287 ax-rnegex 8288 ax-cnre 8290 |
| This proof depends on definitions: df-bi 117 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-reu 2535 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-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-fo 5383 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-sub 8499 df-inn 9306 df-2 9364 df-3 9365 df-4 9366 df-5 9367 df-6 9368 df-7 9369 df-8 9370 df-9 9371 df-n0 9566 df-dec 9780 df-ndx 13357 df-slot 13358 df-base 13360 df-edgf 16258 df-vtx 16267 df-iedg 16268 df-uhgrm 16322 |
| This theorem is used by: (None) |
| Copyright terms: Public domain | W3C validator |