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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 8786 | . . . . . . 7 ⊢ (𝐴 ∈ Fin → (𝐵 ⊆ 𝐴 → 𝐵 ≼ 𝐴)) | |
2 | 1 | com12 32 | . . . . . 6 ⊢ (𝐵 ⊆ 𝐴 → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
3 | 2 | adantl 482 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
4 | 3 | impcom 408 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ≼ 𝐴) |
5 | ssfi 8956 | . . . . . 6 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ Fin) | |
6 | 5 | adantrl 713 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ∈ Fin) |
7 | simpl 483 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐴 ∈ Fin) | |
8 | hashdom 14094 | . . . . 5 ⊢ ((𝐵 ∈ Fin ∧ 𝐴 ∈ Fin) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ 𝐵 ≼ 𝐴)) | |
9 | 6, 7, 8 | syl2anc 584 | . . . 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 413 | . 2 ⊢ (𝐴 ∈ Fin → ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴))) |
12 | hashinf 14049 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ¬ 𝐴 ∈ Fin) → (♯‘𝐴) = +∞) | |
13 | ssexg 5247 | . . . . . . . . . . . 12 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → 𝐵 ∈ V) | |
14 | 13 | ancoms 459 | . . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ V) |
15 | hashxrcl 14072 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ V → (♯‘𝐵) ∈ ℝ*) | |
16 | pnfge 12866 | . . . . . . . . . . 11 ⊢ ((♯‘𝐵) ∈ ℝ* → (♯‘𝐵) ≤ +∞) | |
17 | 14, 15, 16 | 3syl 18 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ +∞) |
18 | 17 | ex 413 | . . . . . . . . 9 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
19 | 18 | adantl 482 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
20 | breq2 5078 | . . . . . . . . 9 ⊢ ((♯‘𝐴) = +∞ → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) | |
21 | 20 | adantr 481 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) |
22 | 19, 21 | sylibrd 258 | . . . . . . 7 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴))) |
23 | 22 | expcom 414 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → ((♯‘𝐴) = +∞ → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴)))) |
24 | 23 | adantr 481 | . . . . 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 452 | . . 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 396 = wceq 1539 ∈ wcel 2106 Vcvv 3432 ⊆ wss 3887 class class class wbr 5074 ‘cfv 6433 ≼ cdom 8731 Fincfn 8733 +∞cpnf 11006 ℝ*cxr 11008 ≤ cle 11010 ♯chash 14044 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-oadd 8301 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-xnn0 12306 df-z 12320 df-uz 12583 df-fz 13240 df-hash 14045 |
This theorem is referenced by: prsshashgt1 14125 hashin 14126 nehash2 14188 isnzr2hash 20535 nbfusgrlevtxm1 27744 nbfusgrlevtxm2 27745 konigsberglem5 28620 cycpmconjslem2 31422 lssdimle 31691 hashf1dmcdm 33076 poimirlem9 35786 hashssle 42837 fourierdlem102 43749 fourierdlem114 43761 |
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