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| Mirrors > Home > MPE Home > Th. List > tfr1ALT | Structured version Visualization version GIF version | ||
| Description: Alternate proof of tfr1 8419 using well-ordered 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 7799 | . 2 ⊢ E We On | |
| 2 | epse 5637 | . 2 ⊢ E Se On | |
| 3 | tfrALT.1 | . . . 4 ⊢ 𝐹 = recs(𝐺) | |
| 4 | df-recs 8393 | . . . 4 ⊢ recs(𝐺) = wrecs( E , On, 𝐺) | |
| 5 | 3, 4 | eqtri 2786 | . . 3 ⊢ 𝐹 = wrecs( E , On, 𝐺) |
| 6 | 5 | wfr1 8358 | . 2 ⊢ (( E We On ∧ E Se On) → 𝐹 Fn On) |
| 7 | 1, 2, 6 | mp2an 705 | 1 ⊢ 𝐹 Fn On |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 E cep 5554 Se wse 5606 We wwe 5607 Oncon0 6369 Fn wfn 6542 wrecscwrecs 8343 recscrecs 8392 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pr 5395 ax-un 7761 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-frecs 8313 df-wrecs 8344 df-recs 8393 |
| This theorem is used by: (None) |
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