Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > hashsng | Structured version Visualization version GIF version |
Description: The size of a singleton. (Contributed by Paul Chapman, 26-Oct-2012.) (Proof shortened by Mario Carneiro, 13-Feb-2013.) |
Ref | Expression |
---|---|
hashsng | ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1z 12000 | . . . 4 ⊢ 1 ∈ ℤ | |
2 | en2sn 8576 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
3 | 1, 2 | mpan2 690 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
4 | snfi 8577 | . . . 4 ⊢ {𝐴} ∈ Fin | |
5 | snfi 8577 | . . . 4 ⊢ {1} ∈ Fin | |
6 | hashen 13703 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
7 | 4, 5, 6 | mp2an 691 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
8 | 3, 7 | sylibr 237 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
9 | 1nn0 11901 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
10 | hashfz1 13702 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
11 | 9, 10 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
12 | fzsn 12944 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
13 | 12 | fveq2d 6649 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
14 | 11, 13 | syl5reqr 2848 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
16 | 8, 15 | eqtrdi 2849 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 = wceq 1538 ∈ wcel 2111 {csn 4525 class class class wbr 5030 ‘cfv 6324 (class class class)co 7135 ≈ cen 8489 Fincfn 8492 1c1 10527 ℕ0cn0 11885 ℤcz 11969 ...cfz 12885 ♯chash 13686 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-1o 8085 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-fin 8496 df-card 9352 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-nn 11626 df-n0 11886 df-z 11970 df-uz 12232 df-fz 12886 df-hash 13687 |
This theorem is referenced by: hashen1 13727 hashrabrsn 13729 hashrabsn01 13730 hashunsng 13749 hashunsngx 13750 hashprg 13752 elprchashprn2 13753 hashdifsn 13771 hashsn01 13773 hash1snb 13776 hashmap 13792 hashfun 13794 hashbclem 13806 hashbc 13807 hashf1 13811 hash2prde 13824 hash2pwpr 13830 hashge2el2dif 13834 hashdifsnp1 13850 s1len 13951 ackbijnn 15175 phicl2 16095 dfphi2 16101 vdwlem8 16314 ramcl 16355 cshwshashnsame 16429 efmnd1hash 18049 symg1hash 18510 pgp0 18713 odcau 18721 sylow2a 18736 sylow3lem6 18749 prmcyg 19007 gsumsnfd 19064 ablfac1eulem 19187 ablfac1eu 19188 pgpfaclem2 19197 prmgrpsimpgd 19229 ablsimpgprmd 19230 0ring01eqbi 20039 rng1nnzr 20040 fta1glem2 24767 fta1blem 24769 fta1lem 24903 vieta1lem2 24907 vieta1 24908 vmappw 25701 umgredgnlp 26940 lfuhgr1v0e 27044 usgr1vr 27045 uvtxnm1nbgr 27194 1hevtxdg1 27296 1egrvtxdg1 27299 lfgrwlkprop 27477 rusgrnumwwlkb0 27757 clwwlknon1le1 27886 eupth2eucrct 28002 fusgreghash2wspv 28120 numclwlk1lem1 28154 ex-hash 28238 prmidl0 31034 qsidomlem1 31036 krull 31051 rgmoddim 31096 lsatdim 31103 zarcmplem 31234 esumcst 31432 cntnevol 31597 coinflippv 31851 ccatmulgnn0dir 31922 ofcccat 31923 lpadlem2 32061 derang0 32529 poimirlem26 35083 poimirlem27 35084 poimirlem28 35085 frlmvscadiccat 39440 0ringdif 44494 c0snmhm 44539 |
Copyright terms: Public domain | W3C validator |