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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 12639 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9045 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 704 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9047 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9047 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14401 | . . . 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 13611 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6889 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12535 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14400 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2815 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2816 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2146 {csn 4591 class class class wbr 5111 ‘cfv 6540 (class class class)co 7419 ≈ cen 8946 Fincfn 8949 1c1 11116 ℕ0cn0 12519 ℤcz 12606 ...cfz 13551 ♯chash 14384 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11171 ax-resscn 11172 ax-1cn 11173 ax-icn 11174 ax-addcl 11175 ax-addrcl 11176 ax-mulcl 11177 ax-mulrcl 11178 ax-mulcom 11179 ax-addass 11180 ax-mulass 11181 ax-distr 11182 ax-i2m1 11183 ax-1ne0 11184 ax-1rid 11185 ax-rnegex 11186 ax-rrecex 11187 ax-cnre 11188 ax-pre-lttri 11189 ax-pre-lttrn 11190 ax-pre-ltadd 11191 ax-pre-mulgt0 11192 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-fin 8953 df-card 9941 df-pnf 11260 df-mnf 11261 df-xr 11262 df-ltxr 11263 df-le 11264 df-sub 11458 df-neg 11459 df-nn 12249 df-n0 12520 df-z 12607 df-uz 12879 df-fz 13552 df-hash 14385 |
| This theorem is used by: hashen1 14424 hashrabrsn 14426 hashrabsn01 14427 hashunsng 14446 hashunsngx 14447 hashprg 14449 elprchashprn2 14450 hashdifsn 14469 hashsn01 14471 hash1snb 14474 hashmap 14490 hashfun 14492 hashbclem 14507 hashbc 14508 hashf1 14512 hash2prde 14525 hash2pwpr 14531 hashge2el2dif 14535 hash7g 14541 hash3tpexb 14549 hashdifsnp1 14561 s1len 14663 ackbijnn 15905 phicl2 16849 dfphi2 16855 vdwlem8 17070 ramcl 17111 cshwshashnsame 17185 efmnd1hash 18988 symg1hash 19504 pgp0 19710 odcau 19718 sylow2a 19733 sylow3lem6 19746 prmcyg 20008 gsumsnfd 20065 ablfac1eulem 20188 ablfac1eu 20189 pgpfaclem2 20198 prmgrpsimpgd 20230 ablsimpgprmd 20231 c0snmhm 20591 0ringdif 20675 0ring01eqbi2 20680 0ring01eqbi 20681 rng1nnzr 20929 prmidl0 21528 qsidomlem1 21530 fta1glem2 26377 fta1blem 26379 fta1lem 26519 vieta1lem2 26523 vieta1 26524 vmappw 27331 umgredgnlp 29552 lfuhgr1v0e 29662 usgr1vr 29663 uvtxnm1nbgr 29812 1hevtxdg1 29914 1egrvtxdg1 29917 lfgrwlkprop 30097 rusgrnumwwlkb0 30390 clwwlknon1le1 30519 eupth2eucrct 30639 fusgreghash2wspv 30757 numclwlk1lem1 30791 ex-hash 30875 0ringsubrg 33635 drngidlhash 33805 krull 33825 qsdrng 33843 esplyfval1 34027 rlmdim 34064 lsatdim 34071 zarcmplem 34335 esumcst 34517 cntnevol 34683 coinflippv 34939 ccatmulgnn0dir 34997 ofcccat 34998 lpadlem2 35135 derang0 35698 poimirlem26 38354 poimirlem27 38355 poimirlem28 38356 frlmvscadiccat 43338 |
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