| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > hashp1i | Structured version Visualization version GIF version | ||
| Description: Size of a finite 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 6338 | . . . 4 ⊢ suc 𝐴 = (𝐴 ∪ {𝐴}) | |
| 3 | 1, 2 | eqtri 2752 | . . 3 ⊢ 𝐵 = (𝐴 ∪ {𝐴}) |
| 4 | 3 | fveq2i 6861 | . 2 ⊢ (♯‘𝐵) = (♯‘(𝐴 ∪ {𝐴})) |
| 5 | hashp1i.1 | . . . . 5 ⊢ 𝐴 ∈ ω | |
| 6 | nnfi 9131 | . . . . 5 ⊢ (𝐴 ∈ ω → 𝐴 ∈ Fin) | |
| 7 | 5, 6 | ax-mp 5 | . . . 4 ⊢ 𝐴 ∈ Fin |
| 8 | nnord 7850 | . . . . 5 ⊢ (𝐴 ∈ ω → Ord 𝐴) | |
| 9 | ordirr 6350 | . . . . 5 ⊢ (Ord 𝐴 → ¬ 𝐴 ∈ 𝐴) | |
| 10 | 5, 8, 9 | mp2b 10 | . . . 4 ⊢ ¬ 𝐴 ∈ 𝐴 |
| 11 | hashunsng 14357 | . . . . 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 692 | . . 3 ⊢ (♯‘(𝐴 ∪ {𝐴})) = ((♯‘𝐴) + 1) |
| 14 | hashp1i.3 | . . . . 5 ⊢ (♯‘𝐴) = 𝑀 | |
| 15 | 14 | oveq1i 7397 | . . . 4 ⊢ ((♯‘𝐴) + 1) = (𝑀 + 1) |
| 16 | hashp1i.4 | . . . 4 ⊢ (𝑀 + 1) = 𝑁 | |
| 17 | 15, 16 | eqtri 2752 | . . 3 ⊢ ((♯‘𝐴) + 1) = 𝑁 |
| 18 | 13, 17 | eqtri 2752 | . 2 ⊢ (♯‘(𝐴 ∪ {𝐴})) = 𝑁 |
| 19 | 4, 18 | eqtri 2752 | 1 ⊢ (♯‘𝐵) = 𝑁 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∪ cun 3912 {csn 4589 Ord word 6331 suc csuc 6334 ‘cfv 6511 (class class class)co 7387 ωcom 7842 Fincfn 8918 1c1 11069 + caddc 11071 ♯chash 14295 |
| 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 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| 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 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-oadd 8438 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-dju 9854 df-card 9892 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-n0 12443 df-z 12530 df-uz 12794 df-fz 13469 df-hash 14296 |
| This theorem is referenced by: hash1 14369 hash2 14370 hash3 14371 hash4 14372 |
| Copyright terms: Public domain | W3C validator |