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Mirrors > Home > MPE Home > Th. List > oe1 | Structured version Visualization version GIF version |
Description: Ordinal exponentiation with an exponent of 1. (Contributed by NM, 2-Jan-2005.) |
Ref | Expression |
---|---|
oe1 | ⊢ (𝐴 ∈ On → (𝐴 ↑o 1o) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-1o 8297 | . . . 4 ⊢ 1o = suc ∅ | |
2 | 1 | oveq2i 7286 | . . 3 ⊢ (𝐴 ↑o 1o) = (𝐴 ↑o suc ∅) |
3 | peano1 7735 | . . . 4 ⊢ ∅ ∈ ω | |
4 | onesuc 8360 | . . . 4 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ ω) → (𝐴 ↑o suc ∅) = ((𝐴 ↑o ∅) ·o 𝐴)) | |
5 | 3, 4 | mpan2 688 | . . 3 ⊢ (𝐴 ∈ On → (𝐴 ↑o suc ∅) = ((𝐴 ↑o ∅) ·o 𝐴)) |
6 | 2, 5 | eqtrid 2790 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ↑o 1o) = ((𝐴 ↑o ∅) ·o 𝐴)) |
7 | oe0 8352 | . . 3 ⊢ (𝐴 ∈ On → (𝐴 ↑o ∅) = 1o) | |
8 | 7 | oveq1d 7290 | . 2 ⊢ (𝐴 ∈ On → ((𝐴 ↑o ∅) ·o 𝐴) = (1o ·o 𝐴)) |
9 | om1r 8374 | . 2 ⊢ (𝐴 ∈ On → (1o ·o 𝐴) = 𝐴) | |
10 | 6, 8, 9 | 3eqtrd 2782 | 1 ⊢ (𝐴 ∈ On → (𝐴 ↑o 1o) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2106 ∅c0 4256 Oncon0 6266 suc csuc 6268 (class class class)co 7275 ωcom 7712 1oc1o 8290 ·o comu 8295 ↑o coe 8296 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-oadd 8301 df-omul 8302 df-oexp 8303 |
This theorem is referenced by: omabs 8481 cnfcom3lem 9461 infxpenc2 9778 |
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