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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 12557 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 8988 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 692 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 8990 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 8990 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14309 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 693 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 234 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13520 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6844 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12453 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14308 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2786 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2787 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ∈ wcel 2114 {csn 4567 class class class wbr 5085 ‘cfv 6498 (class class class)co 7367 ≈ cen 8890 Fincfn 8893 1c1 11039 ℕ0cn0 12437 ℤcz 12524 ...cfz 13461 ♯chash 14292 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-card 9863 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-n0 12438 df-z 12525 df-uz 12789 df-fz 13462 df-hash 14293 |
| This theorem is referenced by: hashen1 14332 hashrabrsn 14334 hashrabsn01 14335 hashunsng 14354 hashunsngx 14355 hashprg 14357 elprchashprn2 14358 hashdifsn 14376 hashsn01 14378 hash1snb 14381 hashmap 14397 hashfun 14399 hashbclem 14414 hashbc 14415 hashf1 14419 hash2prde 14432 hash2pwpr 14438 hashge2el2dif 14442 hash7g 14448 hash3tpexb 14456 hashdifsnp1 14468 s1len 14569 ackbijnn 15793 phicl2 16738 dfphi2 16744 vdwlem8 16959 ramcl 17000 cshwshashnsame 17074 efmnd1hash 18860 symg1hash 19365 pgp0 19571 odcau 19579 sylow2a 19594 sylow3lem6 19607 prmcyg 19869 gsumsnfd 19926 ablfac1eulem 20049 ablfac1eu 20050 pgpfaclem2 20059 prmgrpsimpgd 20091 ablsimpgprmd 20092 c0snmhm 20443 0ringdif 20504 0ring01eqbi 20509 rng1nnzr 20752 fta1glem2 26134 fta1blem 26136 fta1lem 26273 vieta1lem2 26277 vieta1 26278 vmappw 27079 umgredgnlp 29216 lfuhgr1v0e 29323 usgr1vr 29324 uvtxnm1nbgr 29473 1hevtxdg1 29575 1egrvtxdg1 29578 lfgrwlkprop 29754 rusgrnumwwlkb0 30042 clwwlknon1le1 30171 eupth2eucrct 30287 fusgreghash2wspv 30405 numclwlk1lem1 30439 ex-hash 30523 0ringsubrg 33312 drngidlhash 33494 prmidl0 33510 qsidomlem1 33512 krull 33539 qsdrng 33557 esplyfval1 33717 rlmdim 33754 lsatdim 33761 zarcmplem 34025 esumcst 34207 cntnevol 34372 coinflippv 34628 ccatmulgnn0dir 34686 ofcccat 34687 lpadlem2 34824 derang0 35351 poimirlem26 37967 poimirlem27 37968 poimirlem28 37969 frlmvscadiccat 42951 |
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