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Mirrors > Home > ILE Home > Th. List > hashfz0 | GIF version |
Description: Value of the numeric cardinality of a nonempty range of nonnegative integers. (Contributed by Alexander van der Vekens, 21-Jul-2018.) |
Ref | Expression |
---|---|
hashfz0 | ⊢ (𝐵 ∈ ℕ0 → (♯‘(0...𝐵)) = (𝐵 + 1)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elnn0uz 9459 | . . 3 ⊢ (𝐵 ∈ ℕ0 ↔ 𝐵 ∈ (ℤ≥‘0)) | |
2 | hashfz 10677 | . . 3 ⊢ (𝐵 ∈ (ℤ≥‘0) → (♯‘(0...𝐵)) = ((𝐵 − 0) + 1)) | |
3 | 1, 2 | sylbi 120 | . 2 ⊢ (𝐵 ∈ ℕ0 → (♯‘(0...𝐵)) = ((𝐵 − 0) + 1)) |
4 | nn0cn 9083 | . . . 4 ⊢ (𝐵 ∈ ℕ0 → 𝐵 ∈ ℂ) | |
5 | 4 | subid1d 8158 | . . 3 ⊢ (𝐵 ∈ ℕ0 → (𝐵 − 0) = 𝐵) |
6 | 5 | oveq1d 5833 | . 2 ⊢ (𝐵 ∈ ℕ0 → ((𝐵 − 0) + 1) = (𝐵 + 1)) |
7 | 3, 6 | eqtrd 2190 | 1 ⊢ (𝐵 ∈ ℕ0 → (♯‘(0...𝐵)) = (𝐵 + 1)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1335 ∈ wcel 2128 ‘cfv 5167 (class class class)co 5818 0cc0 7715 1c1 7716 + caddc 7718 − cmin 8029 ℕ0cn0 9073 ℤ≥cuz 9422 ...cfz 9894 ♯chash 10631 |
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 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-coll 4079 ax-sep 4082 ax-nul 4090 ax-pow 4134 ax-pr 4168 ax-un 4392 ax-setind 4494 ax-iinf 4545 ax-cnex 7806 ax-resscn 7807 ax-1cn 7808 ax-1re 7809 ax-icn 7810 ax-addcl 7811 ax-addrcl 7812 ax-mulcl 7813 ax-addcom 7815 ax-addass 7817 ax-distr 7819 ax-i2m1 7820 ax-0lt1 7821 ax-0id 7823 ax-rnegex 7824 ax-cnre 7826 ax-pre-ltirr 7827 ax-pre-ltwlin 7828 ax-pre-lttrn 7829 ax-pre-apti 7830 ax-pre-ltadd 7831 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rab 2444 df-v 2714 df-sbc 2938 df-csb 3032 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-nul 3395 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-int 3808 df-iun 3851 df-br 3966 df-opab 4026 df-mpt 4027 df-tr 4063 df-id 4252 df-iord 4325 df-on 4327 df-ilim 4328 df-suc 4330 df-iom 4548 df-xp 4589 df-rel 4590 df-cnv 4591 df-co 4592 df-dm 4593 df-rn 4594 df-res 4595 df-ima 4596 df-iota 5132 df-fun 5169 df-fn 5170 df-f 5171 df-f1 5172 df-fo 5173 df-f1o 5174 df-fv 5175 df-riota 5774 df-ov 5821 df-oprab 5822 df-mpo 5823 df-1st 6082 df-2nd 6083 df-recs 6246 df-frec 6332 df-1o 6357 df-er 6473 df-en 6679 df-dom 6680 df-fin 6681 df-pnf 7897 df-mnf 7898 df-xr 7899 df-ltxr 7900 df-le 7901 df-sub 8031 df-neg 8032 df-inn 8817 df-n0 9074 df-z 9151 df-uz 9423 df-fz 9895 df-ihash 10632 |
This theorem is referenced by: fnfz0hash 10685 |
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