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| Mirrors > Home > MPE Home > Th. List > Mathboxes > om1om1r | Structured version Visualization version GIF version | ||
| Description: Ordinal one is both a left and right identity of ordinal multiplication. Lemma 2.15 of [Schloeder] p. 5. See om1 8512 and om1r 8513 for individual statements. (Contributed by RP, 29-Jan-2025.) |
| Ref | Expression |
|---|---|
| om1om1r | ⊢ (𝐴 ∈ On → ((1o ·o 𝐴) = (𝐴 ·o 1o) ∧ (𝐴 ·o 1o) = 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | om1r 8513 | . . 3 ⊢ (𝐴 ∈ On → (1o ·o 𝐴) = 𝐴) | |
| 2 | om1 8512 | . . 3 ⊢ (𝐴 ∈ On → (𝐴 ·o 1o) = 𝐴) | |
| 3 | 1, 2 | eqtr4d 2801 | . 2 ⊢ (𝐴 ∈ On → (1o ·o 𝐴) = (𝐴 ·o 1o)) |
| 4 | 3, 2 | jca 519 | 1 ⊢ (𝐴 ∈ On → ((1o ·o 𝐴) = (𝐴 ·o 1o) ∧ (𝐴 ·o 1o) = 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1561 ∈ wcel 2143 Oncon0 6347 (class class class)co 7397 1oc1o 8431 ·o comu 8436 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pr 5391 ax-un 7719 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6289 df-ord 6350 df-on 6351 df-lim 6352 df-suc 6353 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-ov 7400 df-oprab 7401 df-mpo 7402 df-om 7848 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8382 df-1o 8438 df-oadd 8442 df-omul 8443 |
| This theorem is referenced by: (None) |
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