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| 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 5560 | . . 3 ⊢ ∅:∅⟶∅ | |
| 2 | dm0 4972 | . . . 4 ⊢ dom ∅ = ∅ | |
| 3 | pw0ss 16127 | . . . 4 ⊢ {𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} = ∅ | |
| 4 | 2, 3 | feq23i 5505 | . . 3 ⊢ (∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} ↔ ∅:∅⟶∅) |
| 5 | 1, 4 | mpbir 146 | . 2 ⊢ ∅:dom ∅⟶{𝑠 ∈ 𝒫 ∅ ∣ ∃𝑗 𝑗 ∈ 𝑠} |
| 6 | 0ex 4239 | . . 3 ⊢ ∅ ∈ V | |
| 7 | vtxval0 16097 | . . . . 5 ⊢ (Vtx‘∅) = ∅ | |
| 8 | 7 | eqcomi 2238 | . . . 4 ⊢ ∅ = (Vtx‘∅) |
| 9 | iedgval0 16098 | . . . . 5 ⊢ (iEdg‘∅) = ∅ | |
| 10 | 9 | eqcomi 2238 | . . . 4 ⊢ ∅ = (iEdg‘∅) |
| 11 | 8, 10 | isuhgrm 16115 | . . 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 |
| Syntax hints: ↔ wb 105 ∃wex 1541 ∈ wcel 2205 {crab 2526 Vcvv 2815 ∅c0 3510 𝒫 cpw 3671 dom cdm 4751 ⟶wf 5350 ‘cfv 5354 Vtxcvtx 16056 iEdgciedg 16057 UHGraphcuhgr 16111 |
| 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-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-nul 4238 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-cnex 8223 ax-resscn 8224 ax-1cn 8225 ax-1re 8226 ax-icn 8227 ax-addcl 8228 ax-addrcl 8229 ax-mulcl 8230 ax-addcom 8232 ax-mulcom 8233 ax-addass 8234 ax-mulass 8235 ax-distr 8236 ax-i2m1 8237 ax-1rid 8239 ax-0id 8240 ax-rnegex 8241 ax-cnre 8243 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3045 df-csb 3141 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-nul 3511 df-if 3623 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-br 4112 df-opab 4174 df-mpt 4175 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-iota 5314 df-fun 5356 df-fn 5357 df-f 5358 df-fo 5360 df-fv 5362 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-1st 6336 df-2nd 6337 df-sub 8451 df-inn 9243 df-2 9301 df-3 9302 df-4 9303 df-5 9304 df-6 9305 df-7 9306 df-8 9307 df-9 9308 df-n0 9502 df-dec 9716 df-ndx 13236 df-slot 13237 df-base 13239 df-edgf 16049 df-vtx 16058 df-iedg 16059 df-uhgrm 16113 |
| This theorem is referenced by: (None) |
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