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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 6397 | . . 3 ⊢ ∅ ∈ On | |
| 2 | oav 8475 | . . 3 ⊢ ((𝐴 ∈ On ∧ ∅ ∈ On) → (𝐴 +o ∅) = (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅)) | |
| 3 | 1, 2 | mpan2 701 | . 2 ⊢ (𝐴 ∈ On → (𝐴 +o ∅) = (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅)) |
| 4 | rdg0g 8393 | . 2 ⊢ (𝐴 ∈ On → (rec((𝑥 ∈ V ↦ suc 𝑥), 𝐴)‘∅) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2796 | 1 ⊢ (𝐴 ∈ On → (𝐴 +o ∅) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 Vcvv 3453 ∅c0 4285 ↦ cmpt 5180 Oncon0 6342 suc csuc 6344 ‘cfv 6517 (class class class)co 7392 reccrdg 8375 +o coa 8429 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-ov 7395 df-oprab 7396 df-mpo 7397 df-om 7843 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-oadd 8436 |
| This theorem is referenced by: oa1suc 8495 oacl 8499 oa0r 8502 om0r 8503 oawordri 8514 oaord1 8515 oaword1 8516 oawordeulem 8518 oa00 8523 oaass 8525 oarec 8526 odi 8543 oeoalem 8561 nna0 8569 nna0r 8574 nnm0r 8575 nnawordi 8586 naddoa 8668 cantnflt 9624 fineqvnttrclse 35384 rdgeqoa 37828 oa0suclim 43816 cantnfresb 43865 dflim5 43870 omabs2 43873 tfsconcatb0 43885 ofoafo 43897 ofoaid1 43899 naddcnff 43903 naddcnffo 43905 oaun3lem1 43915 naddgeoa 43935 naddonnn 43936 naddwordnexlem4 43942 |
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