| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: An empty domain implies an empty range. |
| Ref | Expression |
|---|---|
| dm0rn0 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | excom 1393 |
. . . . . 6
| |
| 2 | 1 | notbii 204 |
. . . . 5
|
| 3 | alnex 1380 |
. . . . 5
| |
| 4 | alnex 1380 |
. . . . 5
| |
| 5 | 2, 3, 4 | 3bitr4i 200 |
. . . 4
|
| 6 | noel 2879 |
. . . . . 6
| |
| 7 | 6 | nbn 791 |
. . . . 5
|
| 8 | 7 | albii 1346 |
. . . 4
|
| 9 | noel 2879 |
. . . . . 6
| |
| 10 | 9 | nbn 791 |
. . . . 5
|
| 11 | 10 | albii 1346 |
. . . 4
|
| 12 | 5, 8, 11 | 3bitr3i 198 |
. . 3
|
| 13 | abeq1 2000 |
. . 3
| |
| 14 | abeq1 2000 |
. . 3
| |
| 15 | 12, 13, 14 | 3bitr4i 200 |
. 2
|
| 16 | df-dm 4004 |
. . 3
| |
| 17 | 16 | eqeq1i 1891 |
. 2
|
| 18 | dfrn2 4149 |
. . 3
| |
| 19 | 18 | eqeq1i 1891 |
. 2
|
| 20 | 15, 17, 19 | 3bitr4i 200 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: rn0 4203 relrn0 4204 imadisj 4285 ndmima 4300 rnsnn0 4364 f00 4601 2nd0 5025 map0b 5402 fodomfib 5657 noinfep 5747 fodomb 5962 fseqsupcl 7704 fseqsupubi 7705 climsupi 8415 cvgcmpubi 8446 totbndbnd 15944 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-br 3339 df-opab 3396 df-cnv 4002 df-dm 4004 df-rn 4005 |