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Mirrors > Home > ILE Home > Th. List > hashfz1 | GIF version |
Description: The set (1...𝑁) has 𝑁 elements. (Contributed by Paul Chapman, 22-Jun-2011.) (Revised by Mario Carneiro, 15-Sep-2013.) |
Ref | Expression |
---|---|
hashfz1 | ⊢ (𝑁 ∈ ℕ0 → (♯‘(1...𝑁)) = 𝑁) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0zd 9296 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → 0 ∈ ℤ) | |
2 | eqid 2189 | . . . . . 6 ⊢ frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0) = frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0) | |
3 | 1, 2 | frec2uzf1od 10439 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):ω–1-1-onto→(ℤ≥‘0)) |
4 | f1ocnv 5493 | . . . . 5 ⊢ (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):ω–1-1-onto→(ℤ≥‘0) → ◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):(ℤ≥‘0)–1-1-onto→ω) | |
5 | f1of 5480 | . . . . 5 ⊢ (◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):(ℤ≥‘0)–1-1-onto→ω → ◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):(ℤ≥‘0)⟶ω) | |
6 | 3, 4, 5 | 3syl 17 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → ◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):(ℤ≥‘0)⟶ω) |
7 | elnn0uz 9597 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 ↔ 𝑁 ∈ (ℤ≥‘0)) | |
8 | 7 | biimpi 120 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ (ℤ≥‘0)) |
9 | 6, 8 | ffvelcdmd 5673 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁) ∈ ω) |
10 | 2 | frecfzennn 10459 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → (1...𝑁) ≈ (◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) |
11 | 10 | ensymd 6810 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁) ≈ (1...𝑁)) |
12 | hashennn 10795 | . . 3 ⊢ (((◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁) ∈ ω ∧ (◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁) ≈ (1...𝑁)) → (♯‘(1...𝑁)) = (frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁))) | |
13 | 9, 11, 12 | syl2anc 411 | . 2 ⊢ (𝑁 ∈ ℕ0 → (♯‘(1...𝑁)) = (frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁))) |
14 | oveq1 5904 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝑥 + 1) = (𝑦 + 1)) | |
15 | 14 | cbvmptv 4114 | . . . . . 6 ⊢ (𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑦 ∈ ℤ ↦ (𝑦 + 1)) |
16 | freceq1 6418 | . . . . . 6 ⊢ ((𝑥 ∈ ℤ ↦ (𝑥 + 1)) = (𝑦 ∈ ℤ ↦ (𝑦 + 1)) → frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0) = frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)) | |
17 | 15, 16 | ax-mp 5 | . . . . 5 ⊢ frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0) = frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0) |
18 | 17 | fveq1i 5535 | . . . 4 ⊢ (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) = (frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) |
19 | f1ocnvfv2 5800 | . . . 4 ⊢ ((frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):ω–1-1-onto→(ℤ≥‘0) ∧ 𝑁 ∈ (ℤ≥‘0)) → (frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) = 𝑁) | |
20 | 18, 19 | eqtr3id 2236 | . . 3 ⊢ ((frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0):ω–1-1-onto→(ℤ≥‘0) ∧ 𝑁 ∈ (ℤ≥‘0)) → (frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) = 𝑁) |
21 | 3, 8, 20 | syl2anc 411 | . 2 ⊢ (𝑁 ∈ ℕ0 → (frec((𝑦 ∈ ℤ ↦ (𝑦 + 1)), 0)‘(◡frec((𝑥 ∈ ℤ ↦ (𝑥 + 1)), 0)‘𝑁)) = 𝑁) |
22 | 13, 21 | eqtrd 2222 | 1 ⊢ (𝑁 ∈ ℕ0 → (♯‘(1...𝑁)) = 𝑁) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2160 class class class wbr 4018 ↦ cmpt 4079 ωcom 4607 ◡ccnv 4643 ⟶wf 5231 –1-1-onto→wf1o 5234 ‘cfv 5235 (class class class)co 5897 freccfrec 6416 ≈ cen 6765 0cc0 7842 1c1 7843 + caddc 7845 ℕ0cn0 9207 ℤcz 9284 ℤ≥cuz 9559 ...cfz 10040 ♯chash 10790 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-coll 4133 ax-sep 4136 ax-nul 4144 ax-pow 4192 ax-pr 4227 ax-un 4451 ax-setind 4554 ax-iinf 4605 ax-cnex 7933 ax-resscn 7934 ax-1cn 7935 ax-1re 7936 ax-icn 7937 ax-addcl 7938 ax-addrcl 7939 ax-mulcl 7940 ax-addcom 7942 ax-addass 7944 ax-distr 7946 ax-i2m1 7947 ax-0lt1 7948 ax-0id 7950 ax-rnegex 7951 ax-cnre 7953 ax-pre-ltirr 7954 ax-pre-ltwlin 7955 ax-pre-lttrn 7956 ax-pre-apti 7957 ax-pre-ltadd 7958 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-iun 3903 df-br 4019 df-opab 4080 df-mpt 4081 df-tr 4117 df-id 4311 df-iord 4384 df-on 4386 df-ilim 4387 df-suc 4389 df-iom 4608 df-xp 4650 df-rel 4651 df-cnv 4652 df-co 4653 df-dm 4654 df-rn 4655 df-res 4656 df-ima 4657 df-iota 5196 df-fun 5237 df-fn 5238 df-f 5239 df-f1 5240 df-fo 5241 df-f1o 5242 df-fv 5243 df-riota 5852 df-ov 5900 df-oprab 5901 df-mpo 5902 df-recs 6331 df-frec 6417 df-1o 6442 df-er 6560 df-en 6768 df-dom 6769 df-fin 6770 df-pnf 8025 df-mnf 8026 df-xr 8027 df-ltxr 8028 df-le 8029 df-sub 8161 df-neg 8162 df-inn 8951 df-n0 9208 df-z 9285 df-uz 9560 df-fz 10041 df-ihash 10791 |
This theorem is referenced by: fz1eqb 10805 isfinite4im 10807 fihasheq0 10808 hashsng 10813 fseq1hash 10816 hashfz 10836 nnf1o 11419 summodclem2a 11424 summodc 11426 zsumdc 11427 fsum3 11430 mertenslemi1 11578 prodmodclem3 11618 prodmodclem2a 11619 zproddc 11622 fprodseq 11626 phicl2 12249 phibnd 12252 hashdvds 12256 phiprmpw 12257 eulerth 12268 pcfac 12385 4sqlem11 12436 |
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