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Mirrors > Home > ILE Home > Th. List > hashfiv01gt1 | GIF version |
Description: The size of a finite set is either 0 or 1 or greater than 1. (Contributed by Jim Kingdon, 21-Feb-2022.) |
Ref | Expression |
---|---|
hashfiv01gt1 | ⊢ (𝑀 ∈ Fin → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 109 | . . 3 ⊢ ((𝑀 ∈ Fin ∧ (♯‘𝑀) < 0) → (♯‘𝑀) < 0) | |
2 | hashcl 10715 | . . . . 5 ⊢ (𝑀 ∈ Fin → (♯‘𝑀) ∈ ℕ0) | |
3 | nn0nlt0 9161 | . . . . 5 ⊢ ((♯‘𝑀) ∈ ℕ0 → ¬ (♯‘𝑀) < 0) | |
4 | 2, 3 | syl 14 | . . . 4 ⊢ (𝑀 ∈ Fin → ¬ (♯‘𝑀) < 0) |
5 | 4 | adantr 274 | . . 3 ⊢ ((𝑀 ∈ Fin ∧ (♯‘𝑀) < 0) → ¬ (♯‘𝑀) < 0) |
6 | 1, 5 | pm2.21dd 615 | . 2 ⊢ ((𝑀 ∈ Fin ∧ (♯‘𝑀) < 0) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
7 | orc 707 | . . . 4 ⊢ (((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1) → (((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1) ∨ 1 < (♯‘𝑀))) | |
8 | fz01or 10067 | . . . 4 ⊢ ((♯‘𝑀) ∈ (0...1) ↔ ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1)) | |
9 | df-3or 974 | . . . 4 ⊢ (((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀)) ↔ (((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1) ∨ 1 < (♯‘𝑀))) | |
10 | 7, 8, 9 | 3imtr4i 200 | . . 3 ⊢ ((♯‘𝑀) ∈ (0...1) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
11 | 10 | adantl 275 | . 2 ⊢ ((𝑀 ∈ Fin ∧ (♯‘𝑀) ∈ (0...1)) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
12 | 3mix3 1163 | . . 3 ⊢ (1 < (♯‘𝑀) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) | |
13 | 12 | adantl 275 | . 2 ⊢ ((𝑀 ∈ Fin ∧ 1 < (♯‘𝑀)) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
14 | 2 | nn0zd 9332 | . . 3 ⊢ (𝑀 ∈ Fin → (♯‘𝑀) ∈ ℤ) |
15 | 0zd 9224 | . . 3 ⊢ (𝑀 ∈ Fin → 0 ∈ ℤ) | |
16 | 1zzd 9239 | . . 3 ⊢ (𝑀 ∈ Fin → 1 ∈ ℤ) | |
17 | fztri3or 9995 | . . 3 ⊢ (((♯‘𝑀) ∈ ℤ ∧ 0 ∈ ℤ ∧ 1 ∈ ℤ) → ((♯‘𝑀) < 0 ∨ (♯‘𝑀) ∈ (0...1) ∨ 1 < (♯‘𝑀))) | |
18 | 14, 15, 16, 17 | syl3anc 1233 | . 2 ⊢ (𝑀 ∈ Fin → ((♯‘𝑀) < 0 ∨ (♯‘𝑀) ∈ (0...1) ∨ 1 < (♯‘𝑀))) |
19 | 6, 11, 13, 18 | mpjao3dan 1302 | 1 ⊢ (𝑀 ∈ Fin → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ∨ wo 703 ∨ w3o 972 = wceq 1348 ∈ wcel 2141 class class class wbr 3989 ‘cfv 5198 (class class class)co 5853 Fincfn 6718 0cc0 7774 1c1 7775 < clt 7954 ℕ0cn0 9135 ℤcz 9212 ...cfz 9965 ♯chash 10709 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-nul 4115 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-iinf 4572 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-addcom 7874 ax-addass 7876 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-0id 7882 ax-rnegex 7883 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-apti 7889 ax-pre-ltadd 7890 |
This theorem depends on definitions: df-bi 116 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-tr 4088 df-id 4278 df-iord 4351 df-on 4353 df-ilim 4354 df-suc 4356 df-iom 4575 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-recs 6284 df-frec 6370 df-er 6513 df-en 6719 df-dom 6720 df-fin 6721 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-inn 8879 df-n0 9136 df-z 9213 df-uz 9488 df-fz 9966 df-ihash 10710 |
This theorem is referenced by: (None) |
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