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| Description: A condition showing a class is single-rooted. (See funcnv 3632). |
| Ref | Expression |
|---|---|
| funcnv3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfrn2 3367 |
. . . . . 6
| |
| 2 | 1 | abeq2i 1607 |
. . . . 5
|
| 3 | 2 | biimpi 149 |
. . . 4
|
| 4 | 3 | biantrurd 730 |
. . 3
|
| 5 | 4 | ralbiia 1711 |
. 2
|
| 6 | funcnv 3632 |
. 2
| |
| 7 | df-reu 1689 |
. . . 4
| |
| 8 | visset 1851 |
. . . . . . 7
| |
| 9 | 8 | breldm 3379 |
. . . . . 6
|
| 10 | 9 | pm4.71ri 640 |
. . . . 5
|
| 11 | 10 | eubii 1420 |
. . . 4
|
| 12 | eu5 1442 |
. . . 4
| |
| 13 | 7, 11, 12 | 3bitr2i 177 |
. . 3
|
| 14 | 13 | ralbii 1705 |
. 2
|
| 15 | 5, 6, 14 | 3bitr4i 181 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 994 ax-gen 995 ax-8 996 ax-10 998 ax-11 999 ax-12 1000 ax-13 1001 ax-14 1002 ax-17 1003 ax-4 1005 ax-5o 1007 ax-6o 1010 ax-9o 1155 ax-10o 1173 ax-16 1243 ax-11o 1251 ax-ext 1494 ax-sep 2754 ax-pow 2794 ax-pr 2832 |
| This theorem depends on definitions: df-bi 145 df-or 222 df-an 223 df-3an 780 df-ex 1013 df-sb 1205 df-eu 1415 df-mo 1416 df-clab 1500 df-cleq 1505 df-clel 1508 df-ne 1624 df-ral 1687 df-reu 1689 df-v 1850 df-dif 2093 df-un 2094 df-in 2095 df-ss 2097 df-nul 2325 df-pw 2447 df-sn 2457 df-pr 2458 df-op 2461 df-br 2670 df-opab 2718 df-id 2889 df-xp 3239 df-rel 3240 df-cnv 3241 df-co 3242 df-dm 3243 df-rn 3244 df-fun 3247 |