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| Mirrors > Home > MPE Home > Th. List > 2wspdisj | Structured version Visualization version GIF version | ||
| Description: All simple paths of length 2 from a fixed vertex to another vertex are disjunct. (Contributed by Alexander van der Vekens, 4-Mar-2018.) (Revised by AV, 9-Jan-2022.) |
| Ref | Expression |
|---|---|
| 2wspdisj | ⊢ Disj 𝑏 ∈ (𝑉 ∖ {𝐴})(𝐴(2 WSPathsNOn 𝐺)𝑏) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq2 7424 | . . 3 ⊢ (𝑏 = 𝑐 → (𝐴(2 WSPathsNOn 𝐺)𝑏) = (𝐴(2 WSPathsNOn 𝐺)𝑐)) | |
| 2 | wspthneq1eq2 30314 | . . . . 5 ⊢ ((𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑏) ∧ 𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑐)) → (𝐴 = 𝐴 ∧ 𝑏 = 𝑐)) | |
| 3 | 2 | simprd 501 | . . . 4 ⊢ ((𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑏) ∧ 𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑐)) → 𝑏 = 𝑐) |
| 4 | 3 | 3adant1 1148 | . . 3 ⊢ ((⊤ ∧ 𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑏) ∧ 𝑡 ∈ (𝐴(2 WSPathsNOn 𝐺)𝑐)) → 𝑏 = 𝑐) |
| 5 | 1, 4 | disjord 5096 | . 2 ⊢ (⊤ → Disj 𝑏 ∈ (𝑉 ∖ {𝐴})(𝐴(2 WSPathsNOn 𝐺)𝑏)) |
| 6 | 5 | mptru 1577 | 1 ⊢ Disj 𝑏 ∈ (𝑉 ∖ {𝐴})(𝐴(2 WSPathsNOn 𝐺)𝑏) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ⊤wtru 1571 ∈ wcel 2145 ∖ cdif 3899 {csn 4587 Disj wdisj 5074 (class class class)co 7416 2c2 12322 WSPathsNOn cwwspthsnon 30283 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-ifp 1079 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-disj 5075 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-1st 7989 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8458 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-n0 12532 df-z 12619 df-uz 12891 df-fz 13564 df-fzo 13712 df-hash 14397 df-word 14581 df-wlks 30045 df-wlkson 30046 df-trls 30140 df-trlson 30141 df-pths 30164 df-spths 30165 df-pthson 30166 df-spthson 30167 df-wwlksnon 30286 df-wspthsnon 30288 |
| This theorem is used by: frgrhash2wsp 30798 |
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