| 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 12766 | . . . 4 ⊢ 1 ∈ ℤ | |
| 2 | en2sn 9107 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 1 ∈ ℤ) → {𝐴} ≈ {1}) | |
| 3 | 1, 2 | mpan2 704 | . . 3 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≈ {1}) |
| 4 | snfi 9109 | . . . 4 ⊢ {𝐴} ∈ Fin | |
| 5 | snfi 9109 | . . . 4 ⊢ {1} ∈ Fin | |
| 6 | hashen 14532 | . . . 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 13740 | . . . . 5 ⊢ (1 ∈ ℤ → (1...1) = {1}) | |
| 10 | 9 | fveq2d 6920 | . . . 4 ⊢ (1 ∈ ℤ → (♯‘(1...1)) = (♯‘{1})) |
| 11 | 1nn0 12662 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 12 | hashfz1 14531 | . . . . 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 2147 {csn 4588 class class class wbr 5108 ‘cfv 6566 (class class class)co 7451 ≈ cen 9008 Fincfn 9011 1c1 11240 ℕ0cn0 12646 ℤcz 12733 ...cfz 13679 ♯chash 14515 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-int 4913 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-1o 8514 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-card 10057 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-n0 12647 df-z 12734 df-uz 13006 df-fz 13680 df-hash 14516 |
| This theorem is used by: hashen1 14555 hashrabrsn 14557 hashrabsn01 14558 hashunsng 14577 hashunsngx 14578 hashprg 14580 elprchashprn2 14581 hashdifsn 14600 hashsn01 14602 hash1snb 14605 hashmap 14621 hashfun 14623 hashbclem 14638 hashbc 14639 hashf1 14643 hash2prde 14656 hash2pwpr 14662 hashge2el2dif 14666 hash7g 14672 hash3tpexb 14680 hashdifsnp1 14692 s1len 14794 ackbijnn 16041 phicl2 16989 dfphi2 16995 vdwlem8 17210 ramcl 17251 cshwshashnsame 17325 efmnd1hash 19138 symg1hash 19655 pgp0 19861 odcau 19869 sylow2a 19884 sylow3lem6 19897 prmcyg 20159 gsumsnfd 20216 ablfac1eulem 20339 ablfac1eu 20340 pgpfaclem2 20349 prmgrpsimpgd 20381 ablsimpgprmd 20382 c0snmhm 20744 0ringdif 20829 0ring01eqbi2 20834 0ring01eqbi 20835 rng1nnzr 21084 prmidl0 21685 qsidomlem1 21687 fta1glem2 26542 fta1blem 26544 fta1lem 26683 vieta1lem2 26689 vieta1 26690 vmappw 27500 umgredgnlp 29782 lfuhgr1v0e 29892 usgr1vr 29893 uvtxnm1nbgr 30042 1hevtxdg1 30144 1egrvtxdg1 30147 lfgrwlkprop 30327 rusgrnumwwlkb0 30620 clwwlknon1le1 30749 eupth2eucrct 30875 fusgreghash2wspv 30993 numclwlk1lem1 31027 ex-hash 31111 0ringsubrg 33911 drngidlhash 34087 krull 34107 qsdrng 34125 esplyfval1 34316 rlmdim 34353 lsatdim 34360 zarcmplem 34624 esumcst 34806 cntnevol 34972 coinflippv 35227 ccatmulgnn0dir 35285 ofcccat 35286 lpadlem2 35423 derang0 36142 poimirlem26 38832 poimirlem27 38833 poimirlem28 38834 frlmvscadiccat 43839 |
| Copyright terms: Public domain | W3C validator |