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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 8974 | . . . . . . 7 ⊢ (𝐴 ∈ Fin → (𝐵 ⊆ 𝐴 → 𝐵 ≼ 𝐴)) | |
| 2 | 1 | com12 32 | . . . . . 6 ⊢ (𝐵 ⊆ 𝐴 → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
| 3 | 2 | adantl 481 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (𝐴 ∈ Fin → 𝐵 ≼ 𝐴)) |
| 4 | 3 | impcom 407 | . . . 4 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ≼ 𝐴) |
| 5 | ssfi 9143 | . . . . . 6 ⊢ ((𝐴 ∈ Fin ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ Fin) | |
| 6 | 5 | adantrl 716 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐵 ∈ Fin) |
| 7 | simpl 482 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → 𝐴 ∈ Fin) | |
| 8 | hashdom 14351 | . . . . 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 257 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴)) → (♯‘𝐵) ≤ (♯‘𝐴)) |
| 11 | 10 | ex 412 | . 2 ⊢ (𝐴 ∈ Fin → ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ (♯‘𝐴))) |
| 12 | hashinf 14307 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ¬ 𝐴 ∈ Fin) → (♯‘𝐴) = +∞) | |
| 13 | ssexg 5281 | . . . . . . . . . . . 12 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → 𝐵 ∈ V) | |
| 14 | 13 | ancoms 458 | . . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → 𝐵 ∈ V) |
| 15 | hashxrcl 14329 | . . . . . . . . . . 11 ⊢ (𝐵 ∈ V → (♯‘𝐵) ∈ ℝ*) | |
| 16 | pnfge 13097 | . . . . . . . . . . 11 ⊢ ((♯‘𝐵) ∈ ℝ* → (♯‘𝐵) ≤ +∞) | |
| 17 | 14, 15, 16 | 3syl 18 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ⊆ 𝐴) → (♯‘𝐵) ≤ +∞) |
| 18 | 17 | ex 412 | . . . . . . . . 9 ⊢ (𝐴 ∈ 𝑉 → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
| 19 | 18 | adantl 481 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ +∞)) |
| 20 | breq2 5114 | . . . . . . . . 9 ⊢ ((♯‘𝐴) = +∞ → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) | |
| 21 | 20 | adantr 480 | . . . . . . . 8 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → ((♯‘𝐵) ≤ (♯‘𝐴) ↔ (♯‘𝐵) ≤ +∞)) |
| 22 | 19, 21 | sylibrd 259 | . . . . . . 7 ⊢ (((♯‘𝐴) = +∞ ∧ 𝐴 ∈ 𝑉) → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴))) |
| 23 | 22 | expcom 413 | . . . . . 6 ⊢ (𝐴 ∈ 𝑉 → ((♯‘𝐴) = +∞ → (𝐵 ⊆ 𝐴 → (♯‘𝐵) ≤ (♯‘𝐴)))) |
| 24 | 23 | adantr 480 | . . . . 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 451 | . . 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 206 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3450 ⊆ wss 3917 class class class wbr 5110 ‘cfv 6514 ≼ cdom 8919 Fincfn 8921 +∞cpnf 11212 ℝ*cxr 11214 ≤ cle 11216 ♯chash 14302 |
| 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 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-int 4914 df-iun 4960 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-1st 7971 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-1o 8437 df-oadd 8441 df-er 8674 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-card 9899 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-nn 12194 df-n0 12450 df-xnn0 12523 df-z 12537 df-uz 12801 df-fz 13476 df-hash 14303 |
| This theorem is referenced by: prsshashgt1 14382 hashin 14383 hashf1dmcdm 14416 nehash2 14446 isnzr2hash 20435 nbfusgrlevtxm1 29311 nbfusgrlevtxm2 29312 konigsberglem5 30192 hashpss 32741 cycpmconjslem2 33119 lbslelsp 33600 lssdimle 33610 poimirlem9 37630 aks6d1c4 42119 aks6d1c2lem4 42122 aks6d1c6lem2 42166 aks6d1c6lem3 42167 unitscyglem1 42190 unitscyglem5 42194 hashssle 45303 fourierdlem102 46213 fourierdlem114 46225 clnbgrlevtx 47849 |
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