| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 12519 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 8976 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 691 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 8978 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 8978 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14268 | . . . 4 ⊢ (({𝐴} ∈ Fin ∧ {1} ∈ Fin) → ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1})) | |
| 7 | 4, 5, 6 | mp2an 692 | . . 3 ⊢ ((♯‘{𝐴}) = (♯‘{1}) ↔ {𝐴} ≈ {1}) |
| 8 | 3, 7 | sylibr 234 | . 2 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = (♯‘{1})) |
| 9 | fzsn 13480 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6836 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12415 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14267 | . . . . 5 ⊢ (1 ∈ ℕ0 → (♯‘(1...1)) = 1) | |
| 13 | 11, 12 | ax-mp 5 | . . . 4 ⊢ (♯‘(1...1)) = 1 |
| 14 | 10, 13 | eqtr3di 2784 | . . 3 ⊢ (1 ∈ ℤ → (♯‘{1}) = 1) |
| 15 | 1, 14 | ax-mp 5 | . 2 ⊢ (♯‘{1}) = 1 |
| 16 | 8, 15 | eqtrdi 2785 | 1 ⊢ (𝐴 ∈ 𝑉 → (♯‘{𝐴}) = 1) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1541 ∈ wcel 2113 {csn 4578 class class class wbr 5096 ‘cfv 6490 (class class class)co 7356 ≈ cen 8878 Fincfn 8881 1c1 11025 ℕ0cn0 12399 ℤcz 12486 ...cfz 13421 ♯chash 14251 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 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 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-card 9849 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-nn 12144 df-n0 12400 df-z 12487 df-uz 12750 df-fz 13422 df-hash 14252 |
| This theorem is referenced by: hashen1 14291 hashrabrsn 14293 hashrabsn01 14294 hashunsng 14313 hashunsngx 14314 hashprg 14316 elprchashprn2 14317 hashdifsn 14335 hashsn01 14337 hash1snb 14340 hashmap 14356 hashfun 14358 hashbclem 14373 hashbc 14374 hashf1 14378 hash2prde 14391 hash2pwpr 14397 hashge2el2dif 14401 hash7g 14407 hash3tpexb 14415 hashdifsnp1 14427 s1len 14528 ackbijnn 15749 phicl2 16693 dfphi2 16699 vdwlem8 16914 ramcl 16955 cshwshashnsame 17029 efmnd1hash 18815 symg1hash 19317 pgp0 19523 odcau 19531 sylow2a 19546 sylow3lem6 19559 prmcyg 19821 gsumsnfd 19878 ablfac1eulem 20001 ablfac1eu 20002 pgpfaclem2 20011 prmgrpsimpgd 20043 ablsimpgprmd 20044 c0snmhm 20397 0ringdif 20458 0ring01eqbi 20463 rng1nnzr 20706 fta1glem2 26128 fta1blem 26130 fta1lem 26269 vieta1lem2 26273 vieta1 26274 vmappw 27080 umgredgnlp 29169 lfuhgr1v0e 29276 usgr1vr 29277 uvtxnm1nbgr 29426 1hevtxdg1 29529 1egrvtxdg1 29532 lfgrwlkprop 29708 rusgrnumwwlkb0 29996 clwwlknon1le1 30125 eupth2eucrct 30241 fusgreghash2wspv 30359 numclwlk1lem1 30393 ex-hash 30477 0ringsubrg 33282 drngidlhash 33464 prmidl0 33480 qsidomlem1 33482 krull 33509 qsdrng 33527 rlmdim 33715 rgmoddimOLD 33716 lsatdim 33723 zarcmplem 33987 esumcst 34169 cntnevol 34334 coinflippv 34590 ccatmulgnn0dir 34648 ofcccat 34649 lpadlem2 34786 derang0 35312 poimirlem26 37786 poimirlem27 37787 poimirlem28 37788 frlmvscadiccat 42703 |
| Copyright terms: Public domain | W3C validator |