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| Mirrors > Home > MPE Home > Th. List > vtxduhgrun | Structured version Visualization version GIF version | ||
| Description: The degree of a vertex in the union of two hypergraphs on the same vertex set is the sum of the degrees of the vertex in each hypergraph. (Contributed by Mario Carneiro, 12-Mar-2015.) (Revised by Alexander van der Vekens, 21-Dec-2017.) (Revised by AV, 12-Dec-2020.) (Proof shortened by AV, 19-Feb-2021.) |
| Ref | Expression |
|---|---|
| vtxduhgrun.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| vtxduhgrun.j | ⊢ 𝐽 = (iEdg‘𝐻) |
| vtxduhgrun.vg | ⊢ 𝑉 = (Vtx‘𝐺) |
| vtxduhgrun.vh | ⊢ (𝜑 → (Vtx‘𝐻) = 𝑉) |
| vtxduhgrun.vu | ⊢ (𝜑 → (Vtx‘𝑈) = 𝑉) |
| vtxduhgrun.d | ⊢ (𝜑 → (dom 𝐼 ∩ dom 𝐽) = ∅) |
| vtxduhgrun.g | ⊢ (𝜑 → 𝐺 ∈ UHGraph) |
| vtxduhgrun.h | ⊢ (𝜑 → 𝐻 ∈ UHGraph) |
| vtxduhgrun.n | ⊢ (𝜑 → 𝑁 ∈ 𝑉) |
| vtxduhgrun.u | ⊢ (𝜑 → (iEdg‘𝑈) = (𝐼 ∪ 𝐽)) |
| Ref | Expression |
|---|---|
| vtxduhgrun | ⊢ (𝜑 → ((VtxDeg‘𝑈)‘𝑁) = (((VtxDeg‘𝐺)‘𝑁) +e ((VtxDeg‘𝐻)‘𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vtxduhgrun.i | . 2 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 2 | vtxduhgrun.j | . 2 ⊢ 𝐽 = (iEdg‘𝐻) | |
| 3 | vtxduhgrun.vg | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 4 | vtxduhgrun.vh | . 2 ⊢ (𝜑 → (Vtx‘𝐻) = 𝑉) | |
| 5 | vtxduhgrun.vu | . 2 ⊢ (𝜑 → (Vtx‘𝑈) = 𝑉) | |
| 6 | vtxduhgrun.d | . 2 ⊢ (𝜑 → (dom 𝐼 ∩ dom 𝐽) = ∅) | |
| 7 | vtxduhgrun.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ UHGraph) | |
| 8 | 1 | uhgrfun 29644 | . . 3 ⊢ (𝐺 ∈ UHGraph → Fun 𝐼) |
| 9 | 7, 8 | syl 18 | . 2 ⊢ (𝜑 → Fun 𝐼) |
| 10 | vtxduhgrun.h | . . 3 ⊢ (𝜑 → 𝐻 ∈ UHGraph) | |
| 11 | 2 | uhgrfun 29644 | . . 3 ⊢ (𝐻 ∈ UHGraph → Fun 𝐽) |
| 12 | 10, 11 | syl 18 | . 2 ⊢ (𝜑 → Fun 𝐽) |
| 13 | vtxduhgrun.n | . 2 ⊢ (𝜑 → 𝑁 ∈ 𝑉) | |
| 14 | vtxduhgrun.u | . 2 ⊢ (𝜑 → (iEdg‘𝑈) = (𝐼 ∪ 𝐽)) | |
| 15 | 1, 2, 3, 4, 5, 6, 9, 12, 13, 14 | vtxdun 30062 | 1 ⊢ (𝜑 → ((VtxDeg‘𝑈)‘𝑁) = (((VtxDeg‘𝐺)‘𝑁) +e ((VtxDeg‘𝐻)‘𝑁))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ∪ cun 3897 ∩ cin 3898 ∅c0 4279 dom cdm 5651 Fun wfun 6532 ‘cfv 6538 (class class class)co 7420 +e cxad 13239 Vtxcvtx 29574 iEdgciedg 29575 UHGraphcuhgr 29634 VtxDegcvtxdg 30046 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-oadd 8480 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-dju 9982 df-card 10020 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-n0 12607 df-xnn0 12680 df-z 12694 df-uz 12966 df-xadd 13242 df-hash 14475 df-uhgr 29636 df-vtxdg 30047 |
| This theorem is used by: (None) |
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