| 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 1031 |
. . . . 5
| |
| 3 | 19.8a 1031 |
. . . . 5
| |
| 4 | 2, 3 | jca 288 |
. . . 4
|
| 5 | visset 1816 |
. . . . . 6
| |
| 6 | 5 | opelxp 3220 |
. . . . 5
|
| 7 | visset 1816 |
. . . . . . 7
| |
| 8 | 7 | eldm2 3314 |
. . . . . 6
|
| 9 | 5 | elrn2 3355 |
. . . . . 6
|
| 10 | 8, 9 | anbi12i 484 |
. . . . 5
|
| 11 | 6, 10 | bitr 173 |
. . . 4
|
| 12 | 4, 11 | sylibr 200 |
. . 3
|
| 13 | 12 | a1i 8 |
. 2
|
| 14 | 1, 13 | relssdv 3255 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: relfld 3521 cnvexg 3525 coexg 3530 resfunexg 3585 cofunexg 3586 fnex 3613 fssxp 3643 oprabss 4012 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-br 2625 df-opab 2672 df-xp 3190 df-rel 3191 df-cnv 3192 df-dm 3194 df-rn 3195 |