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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 12548 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 8978 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 697 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 8980 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 8980 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14300 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 698 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 235 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13511 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6831 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12444 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14299 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2789 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2790 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 = wceq 1547 ∈ wcel 2119 {csn 4555 class class class wbr 5072 ‘cfv 6485 (class class class)co 7356 ≈ cen 8880 Fincfn 8883 1c1 11030 ℕ0cn0 12428 ℤcz 12515 ...cfz 13452 ♯chash 14283 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-int 4878 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-card 9854 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12166 df-n0 12429 df-z 12516 df-uz 12780 df-fz 13453 df-hash 14284 |
| This theorem is referenced by: hashen1 14323 hashrabrsn 14325 hashrabsn01 14326 hashunsng 14345 hashunsngx 14346 hashprg 14348 elprchashprn2 14349 hashdifsn 14367 hashsn01 14369 hash1snb 14372 hashmap 14388 hashfun 14390 hashbclem 14405 hashbc 14406 hashf1 14410 hash2prde 14423 hash2pwpr 14429 hashge2el2dif 14433 hash7g 14439 hash3tpexb 14447 hashdifsnp1 14459 s1len 14560 ackbijnn 15784 phicl2 16729 dfphi2 16735 vdwlem8 16950 ramcl 16991 cshwshashnsame 17065 efmnd1hash 18851 symg1hash 19356 pgp0 19562 odcau 19570 sylow2a 19585 sylow3lem6 19598 prmcyg 19860 gsumsnfd 19917 ablfac1eulem 20040 ablfac1eu 20041 pgpfaclem2 20050 prmgrpsimpgd 20082 ablsimpgprmd 20083 c0snmhm 20434 0ringdif 20499 0ring01eqbi 20504 rng1nnzr 20747 fta1glem2 26152 fta1blem 26154 fta1lem 26291 vieta1lem2 26295 vieta1 26296 vmappw 27097 umgredgnlp 29234 lfuhgr1v0e 29341 usgr1vr 29342 uvtxnm1nbgr 29491 1hevtxdg1 29593 1egrvtxdg1 29596 lfgrwlkprop 29772 rusgrnumwwlkb0 30060 clwwlknon1le1 30189 eupth2eucrct 30305 fusgreghash2wspv 30423 numclwlk1lem1 30457 ex-hash 30541 0ringsubrg 33332 drngidlhash 33517 prmidl0 33533 qsidomlem1 33535 krull 33562 qsdrng 33580 esplyfval1 33757 rlmdim 33794 lsatdim 33801 zarcmplem 34065 esumcst 34247 cntnevol 34412 coinflippv 34668 ccatmulgnn0dir 34726 ofcccat 34727 lpadlem2 34864 derang0 35397 poimirlem26 38013 poimirlem27 38014 poimirlem28 38015 frlmvscadiccat 42996 |
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