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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 12648 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9048 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 704 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9050 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9050 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14411 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 705 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 237 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13621 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6882 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12544 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14410 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2810 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2811 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 {csn 4584 class class class wbr 5103 ‘cfv 6533 (class class class)co 7413 ≈ cen 8949 Fincfn 8952 1c1 11125 ℕ0cn0 12528 ℤcz 12615 ...cfz 13561 ♯chash 14394 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-card 9944 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-nn 12258 df-n0 12529 df-z 12616 df-uz 12888 df-fz 13562 df-hash 14395 |
| This theorem is used by: hashen1 14434 hashrabrsn 14436 hashrabsn01 14437 hashunsng 14456 hashunsngx 14457 hashprg 14459 elprchashprn2 14460 hashdifsn 14479 hashsn01 14481 hash1snb 14484 hashmap 14500 hashfun 14502 hashbclem 14517 hashbc 14518 hashf1 14522 hash2prde 14535 hash2pwpr 14541 hashge2el2dif 14545 hash7g 14551 hash3tpexb 14559 hashdifsnp1 14571 s1len 14673 ackbijnn 15917 phicl2 16859 dfphi2 16865 vdwlem8 17080 ramcl 17121 cshwshashnsame 17195 efmnd1hash 19001 symg1hash 19517 pgp0 19723 odcau 19731 sylow2a 19746 sylow3lem6 19759 prmcyg 20021 gsumsnfd 20078 ablfac1eulem 20201 ablfac1eu 20202 pgpfaclem2 20211 prmgrpsimpgd 20243 ablsimpgprmd 20244 c0snmhm 20604 0ringdif 20688 0ring01eqbi2 20693 0ring01eqbi 20694 rng1nnzr 20942 prmidl0 21541 qsidomlem1 21543 fta1glem2 26394 fta1blem 26396 fta1lem 26537 vieta1lem2 26543 vieta1 26544 vmappw 27352 umgredgnlp 29604 lfuhgr1v0e 29714 usgr1vr 29715 uvtxnm1nbgr 29864 1hevtxdg1 29966 1egrvtxdg1 29969 lfgrwlkprop 30149 rusgrnumwwlkb0 30442 clwwlknon1le1 30571 eupth2eucrct 30697 fusgreghash2wspv 30815 numclwlk1lem1 30849 ex-hash 30933 0ringsubrg 33691 drngidlhash 33861 krull 33881 qsdrng 33899 esplyfval1 34083 rlmdim 34120 lsatdim 34127 zarcmplem 34391 esumcst 34573 cntnevol 34739 coinflippv 34995 ccatmulgnn0dir 35053 ofcccat 35054 lpadlem2 35191 derang0 35748 poimirlem26 38395 poimirlem27 38396 poimirlem28 38397 frlmvscadiccat 43394 |
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