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| Mirrors > Home > MPE Home > Th. List > oa0 | Structured version Visualization version GIF version | ||
| Description: Addition with zero. Proposition 8.3 of [TakeutiZaring] p. 57. Definition 2.3 of [Schloeder] p. 4. (Contributed by NM, 3-May-1995.) (Revised by Mario Carneiro, 8-Sep-2013.) |
| Ref | Expression |
|---|---|
| oa0 | ⊢ (𝐴 ∈ On → (𝐴 +o ∅) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0elon 6412 | . . 3 ⊢ ∅ ∈ On | |
| 2 | oav 8528 | . . 3 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ On) → (𝐴 +o ∅) = (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅)) | |
| 3 | 1, 2 | mpan2 691 | . 2 ⊢ (𝐴 ∈ On → (𝐴 +o ∅) = (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅)) |
| 4 | rdg0g 8446 | . 2 ⊢ (𝐴 ∈ On → (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2771 | 1 ⊢ (𝐴 ∈ On → (𝐴 +o ∅) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 Vcvv 3464 ∅c0 4313 ↦ cmpt 5206 Oncon0 6357 suc csuc 6359 ‘cfv 6536 (class class class)co 7410 reccrdg 8428 +o coa 8482 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pr 5407 ax-un 7734 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-iun 4974 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7867 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-oadd 8489 |
| This theorem is referenced by: oa1suc 8548 oacl 8552 oa0r 8555 om0r 8556 oawordri 8567 oaord1 8568 oaword1 8569 oawordeulem 8571 oa00 8576 oaass 8578 oarec 8579 odi 8596 oeoalem 8613 nna0 8621 nna0r 8626 nnm0r 8627 nnawordi 8638 naddoa 8719 cantnflt 9691 rdgeqoa 37393 oa0suclim 43266 cantnfresb 43315 dflim5 43320 omabs2 43323 tfsconcatb0 43335 ofoafo 43347 ofoaid1 43349 naddcnff 43353 naddcnffo 43355 oaun3lem1 43365 naddgeoa 43385 naddonnn 43386 naddwordnexlem4 43392 |
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