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| Description: Composition of one-to-one onto functions. |
| Ref | Expression |
|---|---|
| f1oco |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1co 3673 |
. . . 4
| |
| 2 | foco 3688 |
. . . 4
| |
| 3 | 1, 2 | anim12i 333 |
. . 3
|
| 4 | 3 | an4s 510 |
. 2
|
| 5 | df-f1o 3203 |
. . 3
| |
| 6 | df-f1o 3203 |
. . 3
| |
| 7 | 5, 6 | anbi12i 484 |
. 2
|
| 8 | df-f1o 3203 |
. 2
| |
| 9 | 4, 7, 8 | 3imtr4 219 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: isotr 3903 isotrALT 3904 ener 4416 shftefif1olem 8736 counopt 9840 symgf 10400 symggrpi 10401 cmphmp 10507 |
| 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-id 2841 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-fun 3198 df-fn 3199 df-f 3200 df-f1 3201 df-fo 3202 df-f1o 3203 |