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| Mirrors > Home > MPE Home > Th. List > uhgr0 | Structured version Visualization version 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 6788 | . . 3 ⊢ ∅:∅⟶∅ | |
| 2 | dm0 5910 | . . . 4 ⊢ dom ∅ = ∅ | |
| 3 | pw0 4833 | . . . . . 6 ⊢ 𝒫 ∅ = {∅} | |
| 4 | 3 | difeq1i 4062 | . . . . 5 ⊢ (𝒫 ∅ ∖ {∅}) = ({∅} ∖ {∅}) |
| 5 | difid 4328 | . . . . 5 ⊢ ({∅} ∖ {∅}) = ∅ | |
| 6 | 4, 5 | eqtri 2786 | . . . 4 ⊢ (𝒫 ∅ ∖ {∅}) = ∅ |
| 7 | 2, 6 | feq23i 6728 | . . 3 ⊢ (∅:dom ∅⟶(𝒫 ∅ ∖ {∅}) ↔ ∅:∅⟶∅) |
| 8 | 1, 7 | mpbir 234 | . 2 ⊢ ∅:dom ∅⟶(𝒫 ∅ ∖ {∅}) |
| 9 | 0ex 5265 | . . 3 ⊢ ∅ ∈ V | |
| 10 | vtxval0 29650 | . . . . 5 ⊢ (Vtx‘∅) = ∅ | |
| 11 | 10 | eqcomi 2772 | . . . 4 ⊢ ∅ = (Vtx‘∅) |
| 12 | iedgval0 29651 | . . . . 5 ⊢ (iEdg‘∅) = ∅ | |
| 13 | 12 | eqcomi 2772 | . . . 4 ⊢ ∅ = (iEdg‘∅) |
| 14 | 11, 13 | isuhgr 29671 | . . 3 ⊢ (∅ ∈ V → (∅ ∈ UHGraph ↔ ∅:dom ∅⟶(𝒫 ∅ ∖ {∅}))) |
| 15 | 9, 14 | ax-mp 5 | . 2 ⊢ (∅ ∈ UHGraph ↔ ∅:dom ∅⟶(𝒫 ∅ ∖ {∅})) |
| 16 | 8, 15 | mpbir 234 | 1 ⊢ ∅ ∈ UHGraph |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∈ wcel 2147 Vcvv 3454 ∖ cdif 4048 ∅c0 4281 𝒫 cpw 4560 {csn 4588 dom cdm 5656 ⟶wf 6557 ‘cfv 6561 Vtxcvtx 29607 iEdgciedg 29608 UHGraphcuhgr 29667 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-ov 7449 df-om 7905 df-2nd 8029 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-er 8748 df-en 9005 df-dom 9006 df-sdom 9007 df-pnf 11375 df-mnf 11376 df-ltxr 11378 df-nn 12366 df-2 12435 df-3 12436 df-4 12437 df-5 12438 df-6 12439 df-7 12440 df-8 12441 df-9 12442 df-n0 12637 df-dec 12845 df-slot 17392 df-ndx 17404 df-base 17420 df-edgf 29600 df-vtx 29609 df-iedg 29610 df-uhgr 29669 |
| This theorem is used by: (None) |
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