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Mathbox for Stefan O'Rear |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > fiphp3d | Structured version Visualization version GIF version |
Description: Infinite pigeonhole principle for partitioning an infinite set between finitely many buckets. (Contributed by Stefan O'Rear, 18-Oct-2014.) |
Ref | Expression |
---|---|
fiphp3d.a | ⊢ (𝜑 → 𝐴 ≈ ℕ) |
fiphp3d.b | ⊢ (𝜑 → 𝐵 ∈ Fin) |
fiphp3d.c | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐷 ∈ 𝐵) |
Ref | Expression |
---|---|
fiphp3d | ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ominf 8213 | . . . . 5 ⊢ ¬ ω ∈ Fin | |
2 | fiphp3d.c | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐷 ∈ 𝐵) | |
3 | risset 3091 | . . . . . . . . . . . 12 ⊢ (𝐷 ∈ 𝐵 ↔ ∃𝑦 ∈ 𝐵 𝑦 = 𝐷) | |
4 | eqcom 2658 | . . . . . . . . . . . . 13 ⊢ (𝑦 = 𝐷 ↔ 𝐷 = 𝑦) | |
5 | 4 | rexbii 3070 | . . . . . . . . . . . 12 ⊢ (∃𝑦 ∈ 𝐵 𝑦 = 𝐷 ↔ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
6 | 3, 5 | bitri 264 | . . . . . . . . . . 11 ⊢ (𝐷 ∈ 𝐵 ↔ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
7 | 2, 6 | sylib 208 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
8 | 7 | ralrimiva 2995 | . . . . . . . . 9 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) |
9 | rabid2 3148 | . . . . . . . . 9 ⊢ (𝐴 = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦} ↔ ∀𝑥 ∈ 𝐴 ∃𝑦 ∈ 𝐵 𝐷 = 𝑦) | |
10 | 8, 9 | sylibr 224 | . . . . . . . 8 ⊢ (𝜑 → 𝐴 = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦}) |
11 | iunrab 4599 | . . . . . . . 8 ⊢ ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} = {𝑥 ∈ 𝐴 ∣ ∃𝑦 ∈ 𝐵 𝐷 = 𝑦} | |
12 | 10, 11 | syl6reqr 2704 | . . . . . . 7 ⊢ (𝜑 → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} = 𝐴) |
13 | 12 | eleq1d 2715 | . . . . . 6 ⊢ (𝜑 → (∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ 𝐴 ∈ Fin)) |
14 | fiphp3d.a | . . . . . . . 8 ⊢ (𝜑 → 𝐴 ≈ ℕ) | |
15 | nnenom 12819 | . . . . . . . 8 ⊢ ℕ ≈ ω | |
16 | entr 8049 | . . . . . . . 8 ⊢ ((𝐴 ≈ ℕ ∧ ℕ ≈ ω) → 𝐴 ≈ ω) | |
17 | 14, 15, 16 | sylancl 695 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ≈ ω) |
18 | enfi 8217 | . . . . . . 7 ⊢ (𝐴 ≈ ω → (𝐴 ∈ Fin ↔ ω ∈ Fin)) | |
19 | 17, 18 | syl 17 | . . . . . 6 ⊢ (𝜑 → (𝐴 ∈ Fin ↔ ω ∈ Fin)) |
20 | 13, 19 | bitrd 268 | . . . . 5 ⊢ (𝜑 → (∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ ω ∈ Fin)) |
21 | 1, 20 | mtbiri 316 | . . . 4 ⊢ (𝜑 → ¬ ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
22 | fiphp3d.b | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ Fin) | |
23 | iunfi 8295 | . . . . 5 ⊢ ((𝐵 ∈ Fin ∧ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) | |
24 | 22, 23 | sylan 487 | . . . 4 ⊢ ((𝜑 ∧ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → ∪ 𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
25 | 21, 24 | mtand 692 | . . 3 ⊢ (𝜑 → ¬ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
26 | rexnal 3024 | . . 3 ⊢ (∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin ↔ ¬ ∀𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) | |
27 | 25, 26 | sylibr 224 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) |
28 | 17, 15 | jctir 560 | . . . . 5 ⊢ (𝜑 → (𝐴 ≈ ω ∧ ℕ ≈ ω)) |
29 | ssrab2 3720 | . . . . . 6 ⊢ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 | |
30 | 29 | jctl 563 | . . . . 5 ⊢ (¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → ({𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin)) |
31 | ctbnfien 37699 | . . . . 5 ⊢ (((𝐴 ≈ ω ∧ ℕ ≈ ω) ∧ ({𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ⊆ 𝐴 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin)) → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) | |
32 | 28, 30, 31 | syl2an 493 | . . . 4 ⊢ ((𝜑 ∧ ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin) → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
33 | 32 | ex 449 | . . 3 ⊢ (𝜑 → (¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ)) |
34 | 33 | reximdv 3045 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ 𝐵 ¬ {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ∈ Fin → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ)) |
35 | 27, 34 | mpd 15 | 1 ⊢ (𝜑 → ∃𝑦 ∈ 𝐵 {𝑥 ∈ 𝐴 ∣ 𝐷 = 𝑦} ≈ ℕ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 ∧ wa 383 = wceq 1523 ∈ wcel 2030 ∀wral 2941 ∃wrex 2942 {crab 2945 ⊆ wss 3607 ∪ ciun 4552 class class class wbr 4685 ωcom 7107 ≈ cen 7994 Fincfn 7997 ℕcn 11058 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-inf2 8576 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-int 4508 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-oadd 7609 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-fin 8001 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-nn 11059 df-n0 11331 df-z 11416 df-uz 11726 |
This theorem is referenced by: pellexlem5 37714 |
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