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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 12013 | . . . 4 ⊢ 1 ∈ ℤ | |
2 | en2sn 8593 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
3 | 1, 2 | mpan2 689 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
4 | snfi 8594 | . . . 4 ⊢ {𝐴} ∈ Fin | |
5 | snfi 8594 | . . . 4 ⊢ {1} ∈ Fin | |
6 | hashen 13708 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
7 | 4, 5, 6 | mp2an 690 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
8 | 3, 7 | sylibr 236 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
9 | 1nn0 11914 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
10 | hashfz1 13707 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
11 | 9, 10 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
12 | fzsn 12950 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
13 | 12 | fveq2d 6674 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
14 | 11, 13 | syl5reqr 2871 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
16 | 8, 15 | syl6eq 2872 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 = wceq 1537 ∈ wcel 2114 {csn 4567 class class class wbr 5066 ‘cfv 6355 (class class class)co 7156 ≈ cen 8506 Fincfn 8509 1c1 10538 ℕ0cn0 11898 ℤcz 11982 ...cfz 12893 ♯chash 13691 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-card 9368 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-nn 11639 df-n0 11899 df-z 11983 df-uz 12245 df-fz 12894 df-hash 13692 |
This theorem is referenced by: hashen1 13732 hashrabrsn 13734 hashrabsn01 13735 hashunsng 13754 hashunsngx 13755 hashprg 13757 elprchashprn2 13758 hashdifsn 13776 hashsn01 13778 hash1snb 13781 hashmap 13797 hashfun 13799 hashbclem 13811 hashbc 13812 hashf1 13816 hash2prde 13829 hash2pwpr 13835 hashge2el2dif 13839 hashdifsnp1 13855 s1len 13960 ackbijnn 15183 phicl2 16105 dfphi2 16111 vdwlem8 16324 ramcl 16365 cshwshashnsame 16437 efmnd1hash 18057 symg1hash 18518 pgp0 18721 odcau 18729 sylow2a 18744 sylow3lem6 18757 prmcyg 19014 gsumsnfd 19071 ablfac1eulem 19194 ablfac1eu 19195 pgpfaclem2 19204 prmgrpsimpgd 19236 ablsimpgprmd 19237 0ring01eqbi 20046 rng1nnzr 20047 fta1glem2 24760 fta1blem 24762 fta1lem 24896 vieta1lem2 24900 vieta1 24901 vmappw 25693 umgredgnlp 26932 lfuhgr1v0e 27036 usgr1vr 27037 uvtxnm1nbgr 27186 1hevtxdg1 27288 1egrvtxdg1 27291 lfgrwlkprop 27469 rusgrnumwwlkb0 27750 clwwlknon1le1 27880 eupth2eucrct 27996 fusgreghash2wspv 28114 numclwlk1lem1 28148 ex-hash 28232 qsidomlem1 30965 krull 30980 rgmoddim 31008 lsatdim 31015 esumcst 31322 cntnevol 31487 coinflippv 31741 ccatmulgnn0dir 31812 ofcccat 31813 lpadlem2 31951 derang0 32416 poimirlem26 34933 poimirlem27 34934 poimirlem28 34935 frlmvscadiccat 39165 0ringdif 44161 c0snmhm 44206 |
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