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Mirrors > Home > MPE Home > Th. List > usgr0 | Structured version Visualization version Unicode version |
Description: The null graph represented by an empty set is a simple graph. (Contributed by AV, 16-Oct-2020.) |
Ref | Expression |
---|---|
usgr0 | USGraph |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f10 6169 | . . 3 | |
2 | dm0 5339 | . . . 4 | |
3 | f1eq2 6097 | . . . 4 | |
4 | 2, 3 | ax-mp 5 | . . 3 |
5 | 1, 4 | mpbir 221 | . 2 |
6 | 0ex 4790 | . . 3 | |
7 | vtxval0 25931 | . . . . 5 Vtx | |
8 | 7 | eqcomi 2631 | . . . 4 Vtx |
9 | iedgval0 25932 | . . . . 5 iEdg | |
10 | 9 | eqcomi 2631 | . . . 4 iEdg |
11 | 8, 10 | isusgr 26048 | . . 3 USGraph |
12 | 6, 11 | ax-mp 5 | . 2 USGraph |
13 | 5, 12 | mpbir 221 | 1 USGraph |
Colors of variables: wff setvar class |
Syntax hints: wb 196 wceq 1483 wcel 1990 crab 2916 cvv 3200 cdif 3571 c0 3915 cpw 4158 csn 4177 cdm 5114 wf1 5885 cfv 5888 c2 11070 chash 13117 Vtxcvtx 25874 iEdgciedg 25875 USGraph cusgr 26044 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fv 5896 df-slot 15861 df-base 15863 df-edgf 25868 df-vtx 25876 df-iedg 25877 df-usgr 26046 |
This theorem is referenced by: cusgr0 26322 frgr0 27128 |
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