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Mirrors > Home > MPE Home > Th. List > Mathboxes > nna1iscard | Structured version Visualization version GIF version |
Description: For any natural number, the add one operation is results in a cardinal number. (Contributed by RP, 1-Oct-2023.) |
Ref | Expression |
---|---|
nna1iscard | ⊢ (𝑁 ∈ ω → (𝑁 +o 1o) ∈ ran card) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnon 7718 | . . . 4 ⊢ (𝑁 ∈ ω → 𝑁 ∈ On) | |
2 | oa1suc 8361 | . . . 4 ⊢ (𝑁 ∈ On → (𝑁 +o 1o) = suc 𝑁) | |
3 | 1, 2 | syl 17 | . . 3 ⊢ (𝑁 ∈ ω → (𝑁 +o 1o) = suc 𝑁) |
4 | peano2 7737 | . . 3 ⊢ (𝑁 ∈ ω → suc 𝑁 ∈ ω) | |
5 | 3, 4 | jca 512 | . 2 ⊢ (𝑁 ∈ ω → ((𝑁 +o 1o) = suc 𝑁 ∧ suc 𝑁 ∈ ω)) |
6 | simpl 483 | . . 3 ⊢ (((𝑁 +o 1o) = suc 𝑁 ∧ suc 𝑁 ∈ ω) → (𝑁 +o 1o) = suc 𝑁) | |
7 | simpr 485 | . . 3 ⊢ (((𝑁 +o 1o) = suc 𝑁 ∧ suc 𝑁 ∈ ω) → suc 𝑁 ∈ ω) | |
8 | 6, 7 | eqeltrd 2839 | . 2 ⊢ (((𝑁 +o 1o) = suc 𝑁 ∧ suc 𝑁 ∈ ω) → (𝑁 +o 1o) ∈ ω) |
9 | omssrncard 41147 | . . 3 ⊢ ω ⊆ ran card | |
10 | 9 | sseli 3917 | . 2 ⊢ ((𝑁 +o 1o) ∈ ω → (𝑁 +o 1o) ∈ ran card) |
11 | 5, 8, 10 | 3syl 18 | 1 ⊢ (𝑁 ∈ ω → (𝑁 +o 1o) ∈ ran card) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ran crn 5590 Oncon0 6266 suc csuc 6268 (class class class)co 7275 ωcom 7712 1oc1o 8290 +o coa 8294 cardccrd 9693 |
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-sep 5223 ax-nul 5230 ax-pow 5288 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-int 4880 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-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 |
This theorem is referenced by: (None) |
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