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Mirrors > Home > ILE Home > Th. List > hashp1i | GIF version |
Description: Size of a natural number ordinal. (Contributed by Mario Carneiro, 5-Jan-2016.) |
Ref | Expression |
---|---|
hashp1i.1 | ⊢ 𝐴 ∈ ω |
hashp1i.2 | ⊢ 𝐵 = suc 𝐴 |
hashp1i.3 | ⊢ (♯‘𝐴) = 𝑀 |
hashp1i.4 | ⊢ (𝑀 + 1) = 𝑁 |
Ref | Expression |
---|---|
hashp1i | ⊢ (♯‘𝐵) = 𝑁 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hashp1i.2 | . . . 4 ⊢ 𝐵 = suc 𝐴 | |
2 | df-suc 4349 | . . . 4 ⊢ suc 𝐴 = (𝐴 ∪ {𝐴}) | |
3 | 1, 2 | eqtri 2186 | . . 3 ⊢ 𝐵 = (𝐴 ∪ {𝐴}) |
4 | 3 | fveq2i 5489 | . 2 ⊢ (♯‘𝐵) = (♯‘(𝐴 ∪ {𝐴})) |
5 | hashp1i.1 | . . . . 5 ⊢ 𝐴 ∈ ω | |
6 | nnfi 6838 | . . . . 5 ⊢ (𝐴 ∈ ω → 𝐴 ∈ Fin) | |
7 | 5, 6 | ax-mp 5 | . . . 4 ⊢ 𝐴 ∈ Fin |
8 | nnord 4589 | . . . . 5 ⊢ (𝐴 ∈ ω → Ord 𝐴) | |
9 | ordirr 4519 | . . . . 5 ⊢ (Ord 𝐴 → ¬ 𝐴 ∈ 𝐴) | |
10 | 5, 8, 9 | mp2b 8 | . . . 4 ⊢ ¬ 𝐴 ∈ 𝐴 |
11 | hashunsng 10720 | . . . . 5 ⊢ (𝐴 ∈ ω → ((𝐴 ∈ Fin ∧ ¬ 𝐴 ∈ 𝐴) → (♯‘(𝐴 ∪ {𝐴})) = ((♯‘𝐴) + 1))) | |
12 | 5, 11 | ax-mp 5 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ ¬ 𝐴 ∈ 𝐴) → (♯‘(𝐴 ∪ {𝐴})) = ((♯‘𝐴) + 1)) |
13 | 7, 10, 12 | mp2an 423 | . . 3 ⊢ (♯‘(𝐴 ∪ {𝐴})) = ((♯‘𝐴) + 1) |
14 | hashp1i.3 | . . . . 5 ⊢ (♯‘𝐴) = 𝑀 | |
15 | 14 | oveq1i 5852 | . . . 4 ⊢ ((♯‘𝐴) + 1) = (𝑀 + 1) |
16 | hashp1i.4 | . . . 4 ⊢ (𝑀 + 1) = 𝑁 | |
17 | 15, 16 | eqtri 2186 | . . 3 ⊢ ((♯‘𝐴) + 1) = 𝑁 |
18 | 13, 17 | eqtri 2186 | . 2 ⊢ (♯‘(𝐴 ∪ {𝐴})) = 𝑁 |
19 | 4, 18 | eqtri 2186 | 1 ⊢ (♯‘𝐵) = 𝑁 |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 = wceq 1343 ∈ wcel 2136 ∪ cun 3114 {csn 3576 Ord word 4340 suc csuc 4343 ωcom 4567 ‘cfv 5188 (class class class)co 5842 Fincfn 6706 1c1 7754 + caddc 7756 ♯chash 10688 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-addcom 7853 ax-addass 7855 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-0id 7861 ax-rnegex 7862 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 |
This theorem depends on definitions: df-bi 116 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-irdg 6338 df-frec 6359 df-1o 6384 df-oadd 6388 df-er 6501 df-en 6707 df-dom 6708 df-fin 6709 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-inn 8858 df-n0 9115 df-z 9192 df-uz 9467 df-fz 9945 df-ihash 10689 |
This theorem is referenced by: hash1 10724 hash2 10725 hash3 10726 hash4 10727 |
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