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Mirrors > Home > MPE Home > Th. List > tfr1ALT | Structured version Visualization version GIF version |
Description: Alternate proof of tfr1 8027 using well-founded recursion. (Contributed by Scott Fenton, 3-Aug-2020.) (New usage is discouraged.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
tfrALT.1 | ⊢ 𝐹 = recs(𝐺) |
Ref | Expression |
---|---|
tfr1ALT | ⊢ 𝐹 Fn On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | epweon 7491 | . 2 ⊢ E We On | |
2 | epse 5532 | . 2 ⊢ E Se On | |
3 | tfrALT.1 | . . 3 ⊢ 𝐹 = recs(𝐺) | |
4 | df-recs 8002 | . . 3 ⊢ recs(𝐺) = wrecs( E , On, 𝐺) | |
5 | 3, 4 | eqtri 2844 | . 2 ⊢ 𝐹 = wrecs( E , On, 𝐺) |
6 | 1, 2, 5 | wfr1 7967 | 1 ⊢ 𝐹 Fn On |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 E cep 5458 Oncon0 6185 Fn wfn 6344 wrecscwrecs 7940 recscrecs 8001 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-rep 5182 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-iun 4913 df-br 5059 df-opab 5121 df-mpt 5139 df-tr 5165 df-id 5454 df-eprel 5459 df-po 5468 df-so 5469 df-fr 5508 df-se 5509 df-we 5510 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-pred 6142 df-ord 6188 df-on 6189 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-f1 6354 df-fo 6355 df-f1o 6356 df-fv 6357 df-wrecs 7941 df-recs 8002 |
This theorem is referenced by: (None) |
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