| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: A relation is included in the cross product of its domain and range. Exercise 4.12(t) of [Mendelson] p. 235. |
| Ref | Expression |
|---|---|
| relssdmrn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 73 |
. 2
| |
| 2 | visset 2295 |
. . . . . 6
| |
| 3 | 2 | opelxp 4036 |
. . . . 5
|
| 4 | visset 2295 |
. . . . . . 7
| |
| 5 | 4 | eldm2 4154 |
. . . . . 6
|
| 6 | 2 | elrn2 4196 |
. . . . . 6
|
| 7 | 5, 6 | anbi12i 540 |
. . . . 5
|
| 8 | 3, 7 | bitri 190 |
. . . 4
|
| 9 | 19.8a 1376 |
. . . 4
| |
| 10 | 19.8a 1376 |
. . . 4
| |
| 11 | 8, 9, 10 | sylanbrc 527 |
. . 3
|
| 12 | 11 | a1i 8 |
. 2
|
| 13 | 1, 12 | relssdv 4079 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: relrelss 4417 relfld 4419 cnvexg 4424 coexg 4429 resfunexg 4500 cofunexg 4501 fnexALT 4536 fssxp 4575 fssxpOLD 4576 oprabss 4935 on1el3 10412 oprabex2gpop 14337 erex 16262 |
| 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-xp 4000 df-rel 4001 df-cnv 4002 df-dm 4004 df-rn 4005 |