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Mirrors > Home > MPE Home > Th. List > hashss | Structured version Visualization version GIF version |
Description: The size of a subset is less than or equal to the size of its superset. (Contributed by Alexander van der Vekens, 14-Jul-2018.) |
Ref | Expression |
---|---|
hashss | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssdomg 9000 | . . . . . . 7 ⊢ (𝐴 ∈ Fin → (𝐵 ⊆ 𝐴 → 𝐵 ≼ 𝐴)) | |
2 | 1 | com12 32 | . . . . . 6 ⊢ (𝐵 ⊆ 𝐴 → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
3 | 2 | adantl 480 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
4 | 3 | impcom 406 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ≼ 𝐴) |
5 | ssfi 9177 | . . . . . 6 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ Fin) | |
6 | 5 | adantrl 712 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ∈ Fin) |
7 | simpl 481 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐴 ∈ Fin) | |
8 | hashdom 14345 | . . . . 5 ⊢ ((𝐵 ∈ Fin ∧ 𝐴 ∈ Fin) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ 𝐵 ≼ 𝐴)) | |
9 | 6, 7, 8 | syl2anc 582 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ 𝐵 ≼ 𝐴)) |
10 | 4, 9 | mpbird 256 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → (♯‘𝐵) ≤ (♯‘𝐴)) |
11 | 10 | ex 411 | . 2 ⊢ (𝐴 ∈ Fin → ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴))) |
12 | hashinf 14301 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ¬ 𝐴 ∈ Fin) → (♯‘𝐴) = +∞) | |
13 | ssexg 5324 | . . . . . . . . . . . 12 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → 𝐵 ∈ V) | |
14 | 13 | ancoms 457 | . . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ V) |
15 | hashxrcl 14323 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ V → (♯‘𝐵) ∈ ℝ*) | |
16 | pnfge 13116 | . . . . . . . . . . 11 ⊢ ((♯‘𝐵) ∈ ℝ* → (♯‘𝐵) ≤ +∞) | |
17 | 14, 15, 16 | 3syl 18 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ +∞) |
18 | 17 | ex 411 | . . . . . . . . 9 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
19 | 18 | adantl 480 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
20 | breq2 5153 | . . . . . . . . 9 ⊢ ((♯‘𝐴) = +∞ → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) | |
21 | 20 | adantr 479 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) |
22 | 19, 21 | sylibrd 258 | . . . . . . 7 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴))) |
23 | 22 | expcom 412 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → ((♯‘𝐴) = +∞ → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴)))) |
24 | 23 | adantr 479 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ¬ 𝐴 ∈ Fin) → ((♯‘𝐴) = +∞ → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴)))) |
25 | 12, 24 | mpd 15 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ¬ 𝐴 ∈ Fin) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴))) |
26 | 25 | impancom 450 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (¬ 𝐴 ∈ Fin → (♯‘𝐵) ≤ (♯‘𝐴))) |
27 | 26 | com12 32 | . 2 ⊢ (¬ 𝐴 ∈ Fin → ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴))) |
28 | 11, 27 | pm2.61i 182 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 394 = wceq 1539 ∈ wcel 2104 Vcvv 3472 ⊆ wss 3949 class class class wbr 5149 ‘cfv 6544 ≼ cdom 8941 Fincfn 8943 +∞cpnf 11251 ℝ*cxr 11253 ≤ cle 11255 ♯chash 14296 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7729 ax-cnex 11170 ax-resscn 11171 ax-1cn 11172 ax-icn 11173 ax-addcl 11174 ax-addrcl 11175 ax-mulcl 11176 ax-mulrcl 11177 ax-mulcom 11178 ax-addass 11179 ax-mulass 11180 ax-distr 11181 ax-i2m1 11182 ax-1ne0 11183 ax-1rid 11184 ax-rnegex 11185 ax-rrecex 11186 ax-cnre 11187 ax-pre-lttri 11188 ax-pre-lttrn 11189 ax-pre-ltadd 11190 ax-pre-mulgt0 11191 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7369 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-1o 8470 df-oadd 8474 df-er 8707 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-card 9938 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11452 df-neg 11453 df-nn 12219 df-n0 12479 df-xnn0 12551 df-z 12565 df-uz 12829 df-fz 13491 df-hash 14297 |
This theorem is referenced by: prsshashgt1 14376 hashin 14377 nehash2 14441 isnzr2hash 20412 nbfusgrlevtxm1 28899 nbfusgrlevtxm2 28900 konigsberglem5 29774 cycpmconjslem2 32582 lssdimle 32978 hashf1dmcdm 34401 poimirlem9 36802 hashssle 44308 fourierdlem102 45224 fourierdlem114 45236 |
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