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| Mirrors > Home > MPE Home > Th. List > hashv01gt1 | Structured version Visualization version GIF version | ||
| Description: The size of a set is either 0 or 1 or greater than 1. (Contributed by Alexander van der Vekens, 29-Dec-2017.) |
| Ref | Expression |
|---|---|
| hashv01gt1 | ⊢ (𝑀 ∈ 𝑉 → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hashnn0pnf 14296 | . 2 ⊢ (𝑀 ∈ 𝑉 → ((♯‘𝑀) ∈ ℕ0 ∨ (♯‘𝑀) = +∞)) | |
| 2 | elnn0 12431 | . . . 4 ⊢ ((♯‘𝑀) ∈ ℕ0 ↔ ((♯‘𝑀) ∈ ℕ ∨ (♯‘𝑀) = 0)) | |
| 3 | exmidne 2944 | . . . . . . . 8 ⊢ ((♯‘𝑀) = 1 ∨ (♯‘𝑀) ≠ 1) | |
| 4 | nngt1ne1 12198 | . . . . . . . . 9 ⊢ ((♯‘𝑀) ∈ ℕ → (1 < (♯‘𝑀) ↔ (♯‘𝑀) ≠ 1)) | |
| 5 | 4 | orbi2d 921 | . . . . . . . 8 ⊢ ((♯‘𝑀) ∈ ℕ → (((♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀)) ↔ ((♯‘𝑀) = 1 ∨ (♯‘𝑀) ≠ 1))) |
| 6 | 3, 5 | mpbiri 259 | . . . . . . 7 ⊢ ((♯‘𝑀) ∈ ℕ → ((♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 7 | 6 | olcd 880 | . . . . . 6 ⊢ ((♯‘𝑀) ∈ ℕ → ((♯‘𝑀) = 0 ∨ ((♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀)))) |
| 8 | 3orass 1095 | . . . . . 6 ⊢ (((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀)) ↔ ((♯‘𝑀) = 0 ∨ ((♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀)))) | |
| 9 | 7, 8 | sylibr 235 | . . . . 5 ⊢ ((♯‘𝑀) ∈ ℕ → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 10 | 3mix1 1337 | . . . . 5 ⊢ ((♯‘𝑀) = 0 → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) | |
| 11 | 9, 10 | jaoi 863 | . . . 4 ⊢ (((♯‘𝑀) ∈ ℕ ∨ (♯‘𝑀) = 0) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 12 | 2, 11 | sylbi 218 | . . 3 ⊢ ((♯‘𝑀) ∈ ℕ0 → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 13 | 1re 11136 | . . . . . 6 ⊢ 1 ∈ ℝ | |
| 14 | ltpnf 13063 | . . . . . 6 ⊢ (1 ∈ ℝ → 1 < +∞) | |
| 15 | 13, 14 | ax-mp 5 | . . . . 5 ⊢ 1 < +∞ |
| 16 | breq2 5077 | . . . . 5 ⊢ ((♯‘𝑀) = +∞ → (1 < (♯‘𝑀) ↔ 1 < +∞)) | |
| 17 | 15, 16 | mpbiri 259 | . . . 4 ⊢ ((♯‘𝑀) = +∞ → 1 < (♯‘𝑀)) |
| 18 | 17 | 3mix3d 1345 | . . 3 ⊢ ((♯‘𝑀) = +∞ → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 19 | 12, 18 | jaoi 863 | . 2 ⊢ (((♯‘𝑀) ∈ ℕ0 ∨ (♯‘𝑀) = +∞) → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| 20 | 1, 19 | syl 17 | 1 ⊢ (𝑀 ∈ 𝑉 → ((♯‘𝑀) = 0 ∨ (♯‘𝑀) = 1 ∨ 1 < (♯‘𝑀))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ wo 853 ∨ w3o 1091 = wceq 1547 ∈ wcel 2119 ≠ wne 2934 class class class wbr 5073 ‘cfv 6486 ℝcr 11029 0cc0 11030 1c1 11031 +∞cpnf 11168 < clt 11171 ℕcn 12166 ℕ0cn0 12429 ♯chash 14284 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-int 4879 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7808 df-2nd 7933 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-card 9855 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-nn 12167 df-n0 12430 df-xnn0 12503 df-z 12517 df-uz 12781 df-hash 14285 |
| This theorem is referenced by: hashge2el2difr 14435 symgvalstruct 19364 01eq0ringOLD 20504 tgldimor 28589 frgrwopreg 30412 |
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