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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 7808 | . . . 4 ⊢ (𝑁 ∈ ω → 𝑁 ∈ On) | |
2 | oa1suc 8477 | . . . 4 ⊢ (𝑁 ∈ On → (𝑁 +o 1o) = suc 𝑁) | |
3 | 1, 2 | syl 17 | . . 3 ⊢ (𝑁 ∈ ω → (𝑁 +o 1o) = suc 𝑁) |
4 | peano2 7827 | . . 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 2838 | . 2 ⊢ (((𝑁 +o 1o) = suc 𝑁 ∧ suc 𝑁 ∈ ω) → (𝑁 +o 1o) ∈ ω) |
9 | omssrncard 41802 | . . 3 ⊢ ω ⊆ ran card | |
10 | 9 | sseli 3940 | . 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 1541 ∈ wcel 2106 ran crn 5634 Oncon0 6317 suc csuc 6319 (class class class)co 7357 ωcom 7802 1oc1o 8405 +o coa 8409 cardccrd 9871 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 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 2707 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-ral 3065 df-rex 3074 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-int 4908 df-iun 4956 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7803 df-2nd 7922 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-1o 8412 df-oadd 8416 df-er 8648 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-card 9875 |
This theorem is referenced by: (None) |
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