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Mirrors > Home > MPE Home > Th. List > 0clwlk | Structured version Visualization version GIF version |
Description: A pair of an empty set (of edges) and a second set (of vertices) is a closed walk if and only if the second set contains exactly one vertex (in an undirected graph). (Contributed by Alexander van der Vekens, 15-Mar-2018.) (Revised by AV, 17-Feb-2021.) (Revised by AV, 30-Oct-2021.) |
Ref | Expression |
---|---|
0clwlk.v | β’ π = (VtxβπΊ) |
Ref | Expression |
---|---|
0clwlk | β’ (πΊ β π β (β (ClWalksβπΊ)π β π:(0...0)βΆπ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0clwlk.v | . . . 4 β’ π = (VtxβπΊ) | |
2 | 1 | 0wlk 29802 | . . 3 β’ (πΊ β π β (β (WalksβπΊ)π β π:(0...0)βΆπ)) |
3 | 2 | anbi2d 628 | . 2 β’ (πΊ β π β (((πβ0) = (πβ(β―ββ )) β§ β (WalksβπΊ)π) β ((πβ0) = (πβ(β―ββ )) β§ π:(0...0)βΆπ))) |
4 | isclwlk 29463 | . . 3 β’ (β (ClWalksβπΊ)π β (β (WalksβπΊ)π β§ (πβ0) = (πβ(β―ββ )))) | |
5 | 4 | biancomi 462 | . 2 β’ (β (ClWalksβπΊ)π β ((πβ0) = (πβ(β―ββ )) β§ β (WalksβπΊ)π)) |
6 | hash0 14334 | . . . . 5 β’ (β―ββ ) = 0 | |
7 | 6 | eqcomi 2740 | . . . 4 β’ 0 = (β―ββ ) |
8 | 7 | fveq2i 6894 | . . 3 β’ (πβ0) = (πβ(β―ββ )) |
9 | 8 | biantrur 530 | . 2 β’ (π:(0...0)βΆπ β ((πβ0) = (πβ(β―ββ )) β§ π:(0...0)βΆπ)) |
10 | 3, 5, 9 | 3bitr4g 314 | 1 β’ (πΊ β π β (β (ClWalksβπΊ)π β π:(0...0)βΆπ)) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β wb 205 β§ wa 395 = wceq 1540 β wcel 2105 β c0 4322 class class class wbr 5148 βΆwf 6539 βcfv 6543 (class class class)co 7412 0cc0 11116 ...cfz 13491 β―chash 14297 Vtxcvtx 28689 Walkscwlks 29286 ClWalkscclwlks 29460 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-cnex 11172 ax-resscn 11173 ax-1cn 11174 ax-icn 11175 ax-addcl 11176 ax-addrcl 11177 ax-mulcl 11178 ax-mulrcl 11179 ax-mulcom 11180 ax-addass 11181 ax-mulass 11182 ax-distr 11183 ax-i2m1 11184 ax-1ne0 11185 ax-1rid 11186 ax-rnegex 11187 ax-rrecex 11188 ax-cnre 11189 ax-pre-lttri 11190 ax-pre-lttrn 11191 ax-pre-ltadd 11192 ax-pre-mulgt0 11193 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-ifp 1061 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8272 df-wrecs 8303 df-recs 8377 df-rdg 8416 df-1o 8472 df-er 8709 df-map 8828 df-pm 8829 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-card 9940 df-pnf 11257 df-mnf 11258 df-xr 11259 df-ltxr 11260 df-le 11261 df-sub 11453 df-neg 11454 df-nn 12220 df-n0 12480 df-z 12566 df-uz 12830 df-fz 13492 df-fzo 13635 df-hash 14298 df-word 14472 df-wlks 29289 df-clwlks 29461 |
This theorem is referenced by: 0clwlkv 29817 wlkl0 30053 |
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