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Related theorems Unicode version |
| Description: Cardinal addition is equinumerous to union for disjoint sets. |
| Ref | Expression |
|---|---|
| cdaval.1 |
|
| cdaval.2 |
|
| Ref | Expression |
|---|---|
| cdaun |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xp01disj 4133 |
. . 3
| |
| 2 | cdaval.1 |
. . . . 5
| |
| 3 | 0ex 2706 |
. . . . 5
| |
| 4 | 2, 3 | xpsnen 4421 |
. . . 4
|
| 5 | cdaval.2 |
. . . . 5
| |
| 6 | 1on 4128 |
. . . . . 6
| |
| 7 | 6 | elisseti 1814 |
. . . . 5
|
| 8 | 5, 7 | xpsnen 4421 |
. . . 4
|
| 9 | unen 4420 |
. . . 4
| |
| 10 | 4, 8, 9 | mpanl12 707 |
. . 3
|
| 11 | 1, 10 | mpan 694 |
. 2
|
| 12 | 2, 5 | cdaval 4900 |
. 2
|
| 13 | 11, 12 | syl5eqbr 2643 |
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-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-nul 2705 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-ral 1646 df-rex 1647 df-v 1808 df-sbc 1938 df-csb 1998 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-tp 2411 df-op 2412 df-uni 2499 df-int 2529 df-br 2615 df-opab 2662 df-tr 2676 df-eprel 2827 df-id 2830 df-po 2835 df-so 2845 df-fr 2912 df-we 2929 df-ord 2946 df-on 2947 df-suc 2949 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-f1 3190 df-fo 3191 df-f1o 3192 df-fv 3193 df-opr 3956 df-oprab 3957 df-1o 4123 df-en 4357 df-cda 4898 |