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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 8113 | . . . 4 ⊢ 1o = suc ∅ | |
2 | 1 | oveq2i 7162 | . . 3 ⊢ (𝐴 ↑o 1o) = (𝐴 ↑o suc ∅) |
3 | peano1 7601 | . . . 4 ⊢ ∅ ∈ ω | |
4 | onesuc 8166 | . . . 4 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ ω) → (𝐴 ↑o suc ∅) = ((𝐴 ↑o ∅) ·o 𝐴)) | |
5 | 3, 4 | mpan2 691 | . . 3 ⊢ (𝐴 ∈ On → (𝐴 ↑o suc ∅) = ((𝐴 ↑o ∅) ·o 𝐴)) |
6 | 2, 5 | syl5eq 2806 | . 2 ⊢ (𝐴 ∈ On → (𝐴 ↑o 1o) = ((𝐴 ↑o ∅) ·o 𝐴)) |
7 | oe0 8158 | . . 3 ⊢ (𝐴 ∈ On → (𝐴 ↑o ∅) = 1o) | |
8 | 7 | oveq1d 7166 | . 2 ⊢ (𝐴 ∈ On → ((𝐴 ↑o ∅) ·o 𝐴) = (1o ·o 𝐴)) |
9 | om1r 8180 | . 2 ⊢ (𝐴 ∈ On → (1o ·o 𝐴) = 𝐴) | |
10 | 6, 8, 9 | 3eqtrd 2798 | 1 ⊢ (𝐴 ∈ On → (𝐴 ↑o 1o) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2112 ∅c0 4226 Oncon0 6170 suc csuc 6172 (class class class)co 7151 ωcom 7580 1oc1o 8106 ·o comu 8111 ↑o coe 8112 |
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 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-rep 5157 ax-sep 5170 ax-nul 5177 ax-pr 5299 ax-un 7460 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ne 2953 df-ral 3076 df-rex 3077 df-reu 3078 df-rab 3080 df-v 3412 df-sbc 3698 df-csb 3807 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-pss 3878 df-nul 4227 df-if 4422 df-pw 4497 df-sn 4524 df-pr 4526 df-tp 4528 df-op 4530 df-uni 4800 df-iun 4886 df-br 5034 df-opab 5096 df-mpt 5114 df-tr 5140 df-id 5431 df-eprel 5436 df-po 5444 df-so 5445 df-fr 5484 df-we 5486 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6127 df-ord 6173 df-on 6174 df-lim 6175 df-suc 6176 df-iota 6295 df-fun 6338 df-fn 6339 df-f 6340 df-f1 6341 df-fo 6342 df-f1o 6343 df-fv 6344 df-ov 7154 df-oprab 7155 df-mpo 7156 df-om 7581 df-wrecs 7958 df-recs 8019 df-rdg 8057 df-1o 8113 df-oadd 8117 df-omul 8118 df-oexp 8119 |
This theorem is referenced by: omabs 8285 cnfcom3lem 9192 infxpenc2 9475 |
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