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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 11284 | . . . 4 ⊢ 1 ∈ ℤ | |
2 | en2sn 7922 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
3 | 1, 2 | mpan2 703 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
4 | snfi 7923 | . . . 4 ⊢ {𝐴} ∈ Fin | |
5 | snfi 7923 | . . . 4 ⊢ {1} ∈ Fin | |
6 | hashen 12997 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((#‘{𝐴}) = (#‘{1}) ↔ {𝐴} ≈ {1})) | |
7 | 4, 5, 6 | mp2an 704 | . . 3 ⊢ ((#‘{𝐴}) = (#‘{1}) ↔ {𝐴} ≈ {1}) |
8 | 3, 7 | sylibr 223 | . 2 ⊢ (𝐴 ∈ 𝑉 → (#‘{𝐴}) = (#‘{1})) |
9 | 1nn0 11185 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
10 | hashfz1 12996 | . . . . 5 ⊢ (1 ∈ ℕ0 → (#‘(1...1)) = 1) | |
11 | 9, 10 | ax-mp 5 | . . . 4 ⊢ (#‘(1...1)) = 1 |
12 | fzsn 12254 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
13 | 12 | fveq2d 6107 | . . . 4 ⊢ (1 ∈ ℤ → (#‘(1...1)) = (#‘{1})) |
14 | 11, 13 | syl5reqr 2659 | . . 3 ⊢ (1 ∈ ℤ → (#‘{1}) = 1) |
15 | 1, 14 | ax-mp 5 | . 2 ⊢ (#‘{1}) = 1 |
16 | 8, 15 | syl6eq 2660 | 1 ⊢ (𝐴 ∈ 𝑉 → (#‘{𝐴}) = 1) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 = wceq 1475 ∈ wcel 1977 {csn 4125 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 ≈ cen 7838 Fincfn 7841 1c1 9816 ℕ0cn0 11169 ℤcz 11254 ...cfz 12197 #chash 12979 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-card 8648 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-fz 12198 df-hash 12980 |
This theorem is referenced by: hashen1 13021 hashrabrsn 13022 hashrabsn01 13023 hashunsng 13042 hashprg 13043 hashprgOLD 13044 elprchashprn2 13045 hashdifsn 13063 hashsn01 13065 hash1snb 13068 hashmap 13082 hashfun 13084 hashbclem 13093 hashbc 13094 hashf1 13098 hash2prde 13109 hash2pwpr 13115 hashge2el2dif 13117 brfi1indlem 13133 s1len 13238 ackbijnn 14399 phicl2 15311 dfphi2 15317 vdwlem8 15530 ramcl 15571 cshwshashnsame 15648 symg1hash 17638 pgp0 17834 odcau 17842 sylow2a 17857 sylow3lem6 17870 prmcyg 18118 gsumsnfd 18174 ablfac1eulem 18294 ablfac1eu 18295 pgpfaclem2 18304 0ring01eqbi 19094 rng1nnzr 19095 fta1glem2 23730 fta1blem 23732 fta1lem 23866 vieta1lem2 23870 vieta1 23871 vmappw 24642 umgredgnlp 25818 usgraedgprv 25905 usgra1v 25919 uvtxnm1nbgra 26022 constr1trl 26118 1pthonlem1 26119 1pthonlem2 26120 1pthon 26121 vdgr1d 26430 vdgr1b 26431 rusgranumwlkb0 26480 usgreghash2spotv 26593 ex-hash 26702 esumcst 29452 cntnevol 29618 coinflippv 29872 ccatmulgnn0dir 29945 ofcccat 29946 derang0 30405 poimirlem26 32605 poimirlem27 32606 poimirlem28 32607 lfuhgr1v0e 40480 usgr1vr 40481 uvtxanm1nbgr 40631 1hevtxdg1 40721 1egrvtxdg1 40725 lfgrwlkprop 40896 rusgrnumwwlkb0 41174 eupth2eucrct 41385 fusgreghash2wspv 41499 0ringdif 41660 c0snmhm 41705 |
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