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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 12628 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9034 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 703 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9036 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9036 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14388 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 704 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 237 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13599 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6885 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12524 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14387 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2813 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2814 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2143 {csn 4589 class class class wbr 5109 ‘cfv 6536 (class class class)co 7410 ≈ cen 8936 Fincfn 8939 1c1 11105 ℕ0cn0 12508 ℤcz 12595 ...cfz 13539 ♯chash 14371 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11160 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-addrcl 11165 ax-mulcl 11166 ax-mulrcl 11167 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-i2m1 11172 ax-1ne0 11173 ax-1rid 11174 ax-rnegex 11175 ax-rrecex 11176 ax-cnre 11177 ax-pre-lttri 11178 ax-pre-lttrn 11179 ax-pre-ltadd 11180 ax-pre-mulgt0 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-card 9930 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11447 df-neg 11448 df-nn 12238 df-n0 12509 df-z 12596 df-uz 12867 df-fz 13540 df-hash 14372 |
| This theorem is used by: hashen1 14411 hashrabrsn 14413 hashrabsn01 14414 hashunsng 14433 hashunsngx 14434 hashprg 14436 elprchashprn2 14437 hashdifsn 14456 hashsn01 14458 hash1snb 14461 hashmap 14477 hashfun 14479 hashbclem 14494 hashbc 14495 hashf1 14499 hash2prde 14512 hash2pwpr 14518 hashge2el2dif 14522 hash7g 14528 hash3tpexb 14536 hashdifsnp1 14548 s1len 14649 ackbijnn 15887 phicl2 16831 dfphi2 16837 vdwlem8 17052 ramcl 17093 cshwshashnsame 17167 efmnd1hash 18955 symg1hash 19464 pgp0 19670 odcau 19678 sylow2a 19693 sylow3lem6 19706 prmcyg 19968 gsumsnfd 20025 ablfac1eulem 20148 ablfac1eu 20149 pgpfaclem2 20158 prmgrpsimpgd 20190 ablsimpgprmd 20191 c0snmhm 20550 0ringdif 20634 0ring01eqbi2 20639 0ring01eqbi 20640 rng1nnzr 20888 prmidl0 21487 qsidomlem1 21489 fta1glem2 26335 fta1blem 26337 fta1lem 26477 vieta1lem2 26481 vieta1 26482 vmappw 27289 umgredgnlp 29506 lfuhgr1v0e 29613 usgr1vr 29614 uvtxnm1nbgr 29763 1hevtxdg1 29865 1egrvtxdg1 29868 lfgrwlkprop 30044 rusgrnumwwlkb0 30332 clwwlknon1le1 30461 eupth2eucrct 30577 fusgreghash2wspv 30695 numclwlk1lem1 30729 ex-hash 30813 0ringsubrg 33580 drngidlhash 33750 krull 33770 qsdrng 33788 esplyfval1 33972 rlmdim 34009 lsatdim 34016 zarcmplem 34280 esumcst 34462 cntnevol 34627 coinflippv 34883 ccatmulgnn0dir 34941 ofcccat 34942 lpadlem2 35079 derang0 35669 poimirlem26 38325 poimirlem27 38326 poimirlem28 38327 frlmvscadiccat 43308 |
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