| 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 |
|---|---|
| relssdr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 59 |
. 2
| |
| 2 | 19.8a 1025 |
. . . . 5
| |
| 3 | 19.8a 1025 |
. . . . 5
| |
| 4 | 2, 3 | jca 288 |
. . . 4
|
| 5 | visset 1804 |
. . . . . 6
| |
| 6 | 5 | opelxp 3204 |
. . . . 5
|
| 7 | visset 1804 |
. . . . . . 7
| |
| 8 | 7 | eldm2 3297 |
. . . . . 6
|
| 9 | 5 | elrn2 3335 |
. . . . . 6
|
| 10 | 8, 9 | anbi12i 481 |
. . . . 5
|
| 11 | 6, 10 | bitr 173 |
. . . 4
|
| 12 | 4, 11 | sylibr 200 |
. . 3
|
| 13 | 12 | a1i 8 |
. 2
|
| 14 | 1, 13 | relssdv 3239 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: relfld 3501 cnvexg 3505 coexg 3510 resfunexg 3565 cofunexg 3566 fnex 3593 fssxp 3622 oprabss 3991 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-br 2610 df-opab 2657 df-xp 3174 df-rel 3175 df-cnv 3176 df-dm 3178 df-rn 3179 |