Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > hashfxnn0 | Structured version Visualization version GIF version |
Description: The size function is a function into the extended nonnegative integers. (Contributed by Mario Carneiro, 13-Sep-2013.) (Revised by AV, 10-Dec-2020.) |
Ref | Expression |
---|---|
hashfxnn0 | ⊢ ♯:V⟶ℕ0* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2737 | . . . . 5 ⊢ (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) = (rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) | |
2 | eqid 2737 | . . . . 5 ⊢ ((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) = ((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) | |
3 | 1, 2 | hashkf 13898 | . . . 4 ⊢ ((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card):Fin⟶ℕ0 |
4 | pnfex 10886 | . . . . 5 ⊢ +∞ ∈ V | |
5 | 4 | fconst 6605 | . . . 4 ⊢ ((V ∖ Fin) × {+∞}):(V ∖ Fin)⟶{+∞} |
6 | 3, 5 | pm3.2i 474 | . . 3 ⊢ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card):Fin⟶ℕ0 ∧ ((V ∖ Fin) × {+∞}):(V ∖ Fin)⟶{+∞}) |
7 | disjdif 4386 | . . 3 ⊢ (Fin ∩ (V ∖ Fin)) = ∅ | |
8 | fun 6581 | . . 3 ⊢ (((((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card):Fin⟶ℕ0 ∧ ((V ∖ Fin) × {+∞}):(V ∖ Fin)⟶{+∞}) ∧ (Fin ∩ (V ∖ Fin)) = ∅) → (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):(Fin ∪ (V ∖ Fin))⟶(ℕ0 ∪ {+∞})) | |
9 | 6, 7, 8 | mp2an 692 | . 2 ⊢ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):(Fin ∪ (V ∖ Fin))⟶(ℕ0 ∪ {+∞}) |
10 | df-hash 13897 | . . . 4 ⊢ ♯ = (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})) | |
11 | eqid 2737 | . . . 4 ⊢ V = V | |
12 | df-xnn0 12163 | . . . 4 ⊢ ℕ0* = (ℕ0 ∪ {+∞}) | |
13 | feq123 6535 | . . . 4 ⊢ ((♯ = (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})) ∧ V = V ∧ ℕ0* = (ℕ0 ∪ {+∞})) → (♯:V⟶ℕ0* ↔ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):V⟶(ℕ0 ∪ {+∞}))) | |
14 | 10, 11, 12, 13 | mp3an 1463 | . . 3 ⊢ (♯:V⟶ℕ0* ↔ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):V⟶(ℕ0 ∪ {+∞})) |
15 | unvdif 4389 | . . . 4 ⊢ (Fin ∪ (V ∖ Fin)) = V | |
16 | 15 | feq2i 6537 | . . 3 ⊢ ((((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):(Fin ∪ (V ∖ Fin))⟶(ℕ0 ∪ {+∞}) ↔ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):V⟶(ℕ0 ∪ {+∞})) |
17 | 14, 16 | bitr4i 281 | . 2 ⊢ (♯:V⟶ℕ0* ↔ (((rec((𝑥 ∈ V ↦ (𝑥 + 1)), 0) ↾ ω) ∘ card) ∪ ((V ∖ Fin) × {+∞})):(Fin ∪ (V ∖ Fin))⟶(ℕ0 ∪ {+∞})) |
18 | 9, 17 | mpbir 234 | 1 ⊢ ♯:V⟶ℕ0* |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 209 ∧ wa 399 = wceq 1543 Vcvv 3408 ∖ cdif 3863 ∪ cun 3864 ∩ cin 3865 ∅c0 4237 {csn 4541 ↦ cmpt 5135 × cxp 5549 ↾ cres 5553 ∘ ccom 5555 ⟶wf 6376 (class class class)co 7213 ωcom 7644 reccrdg 8145 Fincfn 8626 cardccrd 9551 0cc0 10729 1c1 10730 + caddc 10732 +∞cpnf 10864 ℕ0cn0 12090 ℕ0*cxnn0 12162 ♯chash 13896 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-om 7645 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-nn 11831 df-n0 12091 df-xnn0 12163 df-z 12177 df-uz 12439 df-hash 13897 |
This theorem is referenced by: hashf 13904 hashxnn0 13905 |
Copyright terms: Public domain | W3C validator |